Complete MERN Stack Source Code - Fully Functional Link Management Platform

LinkShield Pro is a production-ready, fully functional link management platform built with the MERN stack. Install it once, and it's ready to use immediately—users can register accounts, create links, track analytics, and access all features from day one.

Target Audience    

• SaaS Entrepreneurs - Launch your own link management business without months of development   
• Digital Agencies - Offer branded link analytics as a white-label service to clients   
• Developers - Skip 600+ hours of development, start with production-ready code   
• Marketing Teams - Deploy for internal campaign tracking and analytics   
• Students & Learners - Study professional MERN stack architecture and best practices

Core Features

AI-Powered Analytics Engine

• Multi-Provider Support: OpenAI GPT-4, Google Gemini, Anthropic Claude, Hugging Face   
• Performance scoring with 0-100 scale and actionable insights   
• Target audience analysis with detailed demographics breakdown   
• Optimal posting time recommendations based on historical click patterns   
• Geographic expansion opportunities identification   
• Growth predictions with daily, weekly, and monthly forecasts   
• Automated report generation with customizable metrics

Advanced Analytics & Real-Time Tracking

• Real-time dashboard updates with sub-second latency   
• Three-tier geographic tracking: City, Region, Country   
• Device type analytics with Mobile, Desktop, Tablet breakdowns   
• Browser fingerprinting for accurate unique visitor detection   
• Comprehensive referrer tracking (Social media, Direct, Search engines, Email)   
• Hourly and daily click pattern analysis with interactive charts   
• Advanced bot detection and automatic filtering algorithms   
• Customizable visualizations using Recharts library

Professional Link Management

• Custom short codes for branded link creation   
• Branded domain support (use your own domain)   
• QR code generation with instant PNG download   
• Password protection for sensitive or private links   
• Configurable expiration dates and click limits per link   
• Bulk operations: delete, archive, activate multiple links simultaneously   
• Tag-based organization system with advanced filtering   
• Link preview with Open Graph metadata support   
• One-click copy functionality for short URLs

Team Collaboration System

• Multi-user team workspaces with unlimited team support   
• Four-tier role management: Owner, Admin, Member, Viewer   
• Granular permission system with view, edit, delete rights   
• Email invitation system with secure, expiring tokens   
• Team-level analytics and comprehensive reporting   
• Member management dashboard with activity logs   
• Cross-team analytics aggregation   
• Collaborative campaign management

Monetization & Payment Processing

• Stripe Integration: Subscription checkout, webhooks, SCA compliance, automatic billing   
• PayPal Integration: Alternative payment gateway for broader customer reach   
• Three-tier pricing structure: Free, Pro, Enterprise (fully customizable)   
• Automatic plan upgrades and downgrades   
• Comprehensive billing history with detailed transaction records   
• Professional invoice generation with PDF downloads   
• Subscription management: pause, cancel, reactivate, plan changes   
• Trial period support with automatic conversion to paid plans   
• Webhook automation for all payment lifecycle events

Enterprise-Grade Security

• JWT authentication with automatic refresh token rotation   
• Email verification using secure 6-digit OTP system   
• Password reset flows with time-limited tokens (1-hour validity)   
• Bcrypt password hashing with 12 rounds (industry standard)   
• Rate limiting on sensitive endpoints for brute-force protection   
• Helmet.js security headers: XSS, clickjacking, MIME-type protection   
• Input validation and sanitization using express-validator   
• CORS configuration with whitelist support   
• MongoDB injection prevention through parameterized queries   
• XSS and CSRF protection on all user-facing forms   
• Secure session management with httpOnly cookies

Professional Email System

• Fully customizable HTML email templates (source code included)   
• Multiple SMTP provider support: Gmail, Outlook/Office365, SendGrid, Mailgun, Custom SMTP   
• Automated workflows: Welcome emails, Email verification, Password reset, Team invitations   
• Responsive email design tested across major email clients   
• Transactional email tracking and delivery monitoring   
• Complete customization guide (50+ pages) included

Modern UI/UX Design

 

• Built with React 18 and Tailwind CSS 3   
• Dark mode support with system preference detection and manual toggle   
• Fully responsive design optimized for mobile, tablet, and desktop   
• Smooth page transitions using Framer Motion   
• Toast notifications with React Hot Toast   
• Loading states and skeleton screens for optimal UX   
• Error boundaries for graceful error handling   
• Lucide React icon library with 900+ professionally designed icons   
• WCAG 2.1 AA accessible components with ARIA labels and keyboard navigation

Technical Stack

Frontend	React 18, Tailwind CSS 3, Vite 5, Framer Motion, Recharts, React Router v6
Backend	Node.js 20, Express 4.18, JWT, Rate Limiting, Nodemailer, Helmet.js
Database	MongoDB 7.0, Mongoose ODM, Indexing, Aggregation Pipelines, Transactions
AI Integration	OpenAI GPT-4, Google Gemini, Anthropic Claude, Hugging Face
Payment Processing	Stripe Checkout & Webhooks, PayPal REST API, SCA Support
Email Services	Nodemailer, Gmail/Outlook/SendGrid SMTP, Custom HTML Templates

Package Contents

Complete Source Code

• Frontend React application (client folder) - Production ready   
• Backend Node.js/Express server (server folder) - Production ready   
• All dependencies managed via package.json   
• Environment configuration templates (.env.example)   
• Database models, schemas, and migration scripts   
• Complete API routes and middleware   
• User authentication system (fully functional)   
• Payment processing integration (Stripe & PayPal)

Documentation

• Installation Guide (25+ pages) - Step-by-step setup process, 25-minute installation   
• Quick Start Guide - Get running in 15 minutes   
• API Documentation - Complete endpoint reference with request/response examples   
• Deployment Guides - Vercel (recommended), VPS (DigitalOcean/AWS), cPanel   
• Environment Configuration - Complete .env setup with explanations   
• Customization Tutorials - Branding, styling, feature modifications   
• Troubleshooting Guide - Common issues and solutions

Bonus Content (Value: $1,150)

• Marketing Success Guide (63 pages) - $500 value
         
  SaaS launch strategies, pricing models, customer acquisition, SEO optimization, content marketing, growth tactics   
• Email Customization Guide (7 pages) - $100 value
         
  HTML email templates, SMTP configuration, automation workflows, deliverability best practices   
• AI Integration Guide (7 pages) - $200 value
         
  Provider setup, prompt engineering, cost optimization strategies, implementation patterns   
• Legal Templates - $300 value
         
  Terms of Service, Privacy Policy, Refund Policy (lawyer-reviewed, GDPR compliant)

Demo Account System

Includes a fully functional demo account system for showcasing your platform:

• Pre-configured demo user with realistic data (10,485 clicks across 15 campaigns)   
• Automatic reset functionality (configurable interval, default 30 minutes)   
• Security middleware to prevent modifications to demo account   
• Allows potential customers to test features without registration   
• Fully customizable or can be disabled if not needed   
• Geographic data from 12+ countries and 50+ cities

Revenue Model & Pricing Suggestions

Plan	Links	Clicks/Month	Suggested Price
Free Tier	10	1,000	$0
Pro Plan	100	50,000	$19-29/month
Enterprise Plan	Unlimited	Unlimited	$99-199/month
Potential Monthly Revenue (100 paying customers)			$1,500-$3,000+

Note: All pricing tiers, limits, and features are fully customizable in the source code.

Installation Timeline

Task	Estimated Time
Extract files and install dependencies (npm install)	10 minutes
Setup MongoDB Atlas (free tier) and configure environment variables	10 minutes
Launch locally and verify functionality (npm start)	5 minutes
Total: Fully Functional Local Platform	25 minutes
Deploy to Vercel (production environment)	30 minutes
Customize branding (logo, colors, company name)	1-2 hours
Total: Live SaaS Business	2-3 hours

Frequently Asked Questions

What exactly am I purchasing?

You are purchasing the complete source code (frontend and backend) for a fully functional link management platform. After installation, the platform is immediately operational—users can register accounts and use all features without any additional development. You receive lifetime ownership with full commercial use rights.

Is the platform functional immediately or does it require additional development?

The platform is 100% functional immediately after installation (approximately 25 minutes). Users can create accounts and utilize all features without any additional development work. Simply install, configure environment variables (MongoDB + SMTP), and the platform is production-ready.

Can I test the platform before purchasing?

Yes. Visit www.lnkshield.com and choose one of two options:

• Option 1: Create your own account with your email address (fully functional, use from scratch)   
• Option 2: Login with demo credentials ([email protected] / demo123) to see pre-loaded data without registration

What is the difference between creating an account and using the demo account?

Creating an Account: You start with a blank slate and create your own links and data. Your data persists across sessions.

Demo Account: Pre-loaded with 10,485 clicks across 15 campaigns to demonstrate analytics capabilities. Data resets every 30 minutes. Both options have full feature access.

What technical knowledge is required?

• Installation: No coding required. Follow the step-by-step installation guide (25 minutes).   
• Branding Customization: Basic HTML/CSS knowledge helpful but not required.   
• Advanced Modifications: JavaScript/React knowledge beneficial for significant customizations.

Can I white-label and resell this platform?

Yes. You can remove all LinkShield branding, implement your own logo and company identity, configure custom pricing, and sell to customers. This is ideal for agencies offering link analytics as a white-label service to clients.

What hosting requirements are needed?

The platform works with any Node.js compatible hosting:

• Recommended: Vercel (free tier available, easiest deployment)   
• VPS Options: DigitalOcean, AWS, Linode, Vultr   
• Other Options: cPanel with Node.js support, Heroku, Netlify, Azure, Google Cloud   
• Database: MongoDB Atlas (free tier with 512MB available)

Are third-party API keys included in the purchase?

You will need to create your own accounts (all have free tiers):

Required:

• MongoDB Atlas (free 512MB tier available)   
• SMTP email service (Gmail works with free account)

Optional:   

• Stripe (for payment processing)   
• OpenAI (for AI-powered features)

Can users actually register and use the platform?

Yes. After installation, your platform is fully operational:

• Users create accounts via the registration page   
• Receive email verification codes   
• Login and access the complete dashboard   
• Create links, track clicks, view analytics   
• Upgrade to paid plans via Stripe/PayPal   
• Invite team members for collaboration

All functionality works out of the box without additional configuration.

Is the demo account system mandatory?

No. The demo account system is optional and can be completely disabled in the code. It is included as a marketing tool to allow potential customers to test your platform without registration, similar to how it's used at www.lnkshield.com.

How do software updates work?

Free lifetime updates are included. When new versions are released, you will receive the updated source code through Codester downloads. Updates can be applied as needed to your deployed instances.

What support is provided?

Six months of email support via Codester messaging system includes:

• Installation assistance and troubleshooting   
• Configuration guidance   
• General implementation guidance

Average response time: 24-48 hours

License & Commercial Rights

Permitted Uses   

• Use for unlimited personal or commercial projects   
• Modify and customize all source code as needed   
• Remove all branding and implement complete white-labeling   
• Deploy on unlimited domains and servers   
• Charge customers and generate revenue   
• Offer as a service to clients (agency license included)   
• Resell platform access using SaaS business model   
• Accept payments from users (Stripe/PayPal integration included)

Restrictions   

• Source code redistribution to other developers is prohibited   
• Sharing on public code repositories (GitHub, GitLab, etc.) is not permitted   
• Listing on other marketplaces as original work is prohibited

Support & Resources

• 
     
• Email Support: 6 months included via Codester messaging (24-48 hour response time)   
• Software Updates: Free lifetime updates when new versions are released   
• Documentation: 100+ pages included in download package   
• Bug Fixes: Confirmed bugs resolved within 7 business days   

Comparison: Build vs. Buy

Factor	Building From Scratch	LinkShield Pro
Development Time	600+ hours	25 minutes
Development Cost	$30,000-$50,000	One-time payment
Time to Launch	4-6 months	Same day
Security	Potential vulnerabilities	Production-tested
Documentation	None	250+ pages
Production Ready	Untested	Live with users

Complete Source Code Package

• Full MERN Stack application - Frontend (React 18) and Backend (Node.js/Express)   
• Fully functional after installation - no additional development required   
• User registration system ready - users can sign up and use all features   
• Authentication system integrated - JWT with refresh tokens   
• Payment processing configured - Stripe and PayPal ready to accept payments   
• White-label ready - remove all branding, implement your own identity   
• Lifetime commercial license - use for unlimited projects    Test platform:

Demo Account System (Optional)

• Pre-configured demo account for platform showcasing   
• Pre-loaded with 10,485 realistic clicks across 15 campaigns   
• Automatic reset functionality (configurable interval, default 30 minutes)   
• Security middleware prevents modifications to demo account   
• Allows users to test features without registration   
• Can be customized or disabled as needed

AI-Powered Analytics

• Multi-provider support: OpenAI GPT-4, Google Gemini, Anthropic Claude, Hugging Face   
• Performance scoring with 0-100 scale and actionable recommendations   
• Target audience analysis with demographic breakdowns   
• Optimal posting time recommendations based on historical patterns   
• Geographic expansion opportunity identification   
• Growth predictions with daily, weekly, monthly forecasts   
• Automated report generation with customizable metrics

Link Management

• Custom short codes for branded link creation   
• Branded domain support (use your own domain)   
• QR code generation with instant PNG download   
• Password protection for sensitive links   
• Configurable click limits and expiration dates   
• Bulk operations (delete, archive, activate multiple links)   
• Tag-based organization with advanced filtering   
• Link preview with Open Graph metadata   
• One-click URL copying

Geographic Analytics

• Three-tier tracking: City, Region, Country   
• IP geolocation using GeoIP-Lite library   
• Geographic heat maps and visualizations   
• Expansion opportunity analysis   
• Regional performance comparisons

Real-Time Tracking

• Sub-second dashboard updates   
• Unique visitor detection via browser fingerprinting   
• Automatic bot detection and filtering   
• Hourly and daily statistics   
• Referrer source tracking (social media, direct, search, email)   
• Device analytics (Mobile, Desktop, Tablet)   
• Browser tracking (Chrome, Firefox, Safari, Edge, etc.)   
• Interactive Recharts visualizations

Team Collaboration

• Multi-user workspaces with unlimited team support   
• Four-tier role system: Owner, Admin, Member, Viewer   
• Granular permissions (view, edit, delete rights)   
• Email invitation system with secure tokens   
• Team-level analytics and reporting   
• Member management dashboard   
• Cross-team analytics aggregation   
• Collaborative campaign management

Monetization & Payments

• Stripe subscription checkout with SCA compliance   
• PayPal payment processing integration   
• Webhook automation for payment lifecycle events   
• Three-tier pricing (Free, Pro, Enterprise) - fully customizable   
• Automatic plan upgrades and downgrades   
• Billing history with transaction records   
• Invoice generation with PDF downloads   
• Subscription management (pause, cancel, change plans)   
• Trial period support with automatic conversion

Security Features

• JWT authentication with refresh token rotation   
• Email verification (6-digit OTP system)   
• Password reset with time-limited tokens   
• Bcrypt password hashing (12 rounds)   
• Rate limiting for brute-force protection   
• Helmet.js security headers (XSS, clickjacking, MIME-type protection)   
• Input validation with express-validator   
• CORS configuration with whitelist support   
• MongoDB injection prevention   
• XSS and CSRF protection

Email System

• Customizable HTML templates (source code included)   
• Multiple SMTP providers: Gmail, Outlook, SendGrid, Mailgun, Custom   
• Automated workflows: Welcome, Verification, Password Reset, Team Invitations   
• Responsive design tested across email clients   
• Complete customization guide (50+ pages)

User Interface

• React 18 with Tailwind CSS 3   
• Dark mode with system preference detection   
• Fully responsive (mobile, tablet, desktop)   
• Framer Motion page transitions   
• React Hot Toast notifications   
• Loading states and skeleton screens   
• Error boundaries for graceful error handling   
• Lucide React icons (900+ icons)   
• WCAG 2.1 AA accessibility compliance

Developer Features

• Clean, well-documented code   
• Modular component architecture   
• Environment-based configuration (.env)   
• RESTful API design   
• Mongoose ODM for MongoDB   
• Vite build system (fast development)   
• Code splitting for optimized loading   
• Hot module replacement (HMR)   
• ESLint code quality checking

Documentation

• Installation guide (25-minute setup)   
• Quick start guide   
• Complete API documentation   
• Deployment guides (Vercel, VPS, cPanel)   
• Customization tutorials   
• Troubleshooting guide   
• Marketing success guide (120 pages)   
• Email customization guide (50+ pages)   
• AI integration guide (40+ pages)

Performance Optimization

• Database indexing on frequently queried fields   
• Pagination for large datasets   
• Response compression middleware   
• Optional Redis caching support   
• Optimized production builds   
• Efficient MongoDB aggregation pipelines   
• Lazy image loading   
• Memoized calculations   
• Debounced user inputs

Bonus Content

• Marketing Success Guide - Launch strategies, pricing models, customer acquisition   
• Email Customization Guide- SMTP setup, templates, automation   
• AI Integration Guide - Provider setup, prompt engineering, cost optimization   
• Legal Templates- Terms of Service, Privacy Policy, Refund Policy (GDPR compliant)

Minimum Server Requirements

• Node.js 18.0 or higher   
• npm 8.0 or higher   
• 512 MB RAM minimum   
• 2 GB disk space   
• MongoDB 4.4 or higher

Recommended Server Requirements

• Node.js 20.0 or higher   
• npm 10.0 or higher   
• 2 GB RAM or more   
• 20 GB SSD storage   
• MongoDB 7.0 or higher   
• Redis 6.0+ (optional, for caching)

Required Services

Essential (free tiers available):

• MongoDB database - MongoDB Atlas free tier (512MB) or self-hosted   
• SMTP email service - Gmail (free), Outlook, SendGrid, Mailgun, or custom SMTP

Optional (for full functionality):

• Stripe account (for payment processing) - Free account, transaction fees apply   
• PayPal business account (for PayPal payments) - Free account, transaction fees apply   
• OpenAI API key (for AI features) - Pay-as-you-go pricing   
• Alternative AI providers: Google Gemini, Anthropic Claude, or Hugging Face

Hosting Compatibility

Fully supported platforms:

• Vercel (recommended - free tier available, easiest deployment)   
• Netlify with serverless functions   
• Heroku with MongoDB add-on   
• DigitalOcean (VPS or App Platform)   
• AWS (EC2, Elastic Beanstalk, or Amplify)   
• Google Cloud Platform (Compute Engine or App Engine)   
• Microsoft Azure (App Service)   
• Linode VPS   
• Vultr VPS   
• cPanel hosting with Node.js support   
• Any Node.js compatible hosting provider

Database hosting options:

• MongoDB Atlas (cloud, free tier 512MB - recommended)   
• Self-hosted MongoDB server   
• MongoDB Docker container   
• DigitalOcean Managed MongoDB   
• AWS DocumentDB   
• Azure Cosmos DB with MongoDB API

Browser Compatibility

Desktop browsers:

• Chrome 90 and above (recommended)   
• Firefox 88 and above   
• Safari 14 and above   
• Edge 90 and above   
• Opera 76 and above   
• Brave (Chromium-based)

Mobile browsers:

• iOS Safari 14 and above   
• Chrome Mobile 90 and above   
• Firefox Mobile 88 and above   
• Samsung Internet 14 and above   
• Opera Mobile

Development Tools (Included)

• Vite 5.0+ (frontend development server and bundler)   
• Nodemon 3.0+ (backend auto-reload during development)   
• ESLint 8.0+ (code quality and linting)   
• Prettier (code formatting)   
• Jest 29.0+ (unit testing framework)   
• Supertest 6.0+ (API endpoint testing)   
• MongoDB Memory Server (test database)

Technical Skill Requirements

Basic setup and installation (Beginner level):

• Ability to follow step-by-step documentation   
• Basic command line/terminal usage   
• Copy and paste environment configuration   
• No coding required for standard installation   
• Time required: 25 minutes

Branding customization (Intermediate level):

• Basic HTML/CSS knowledge helpful   
• Understanding of environment variables   
• Text editor proficiency   
• Time required: 1-2 hours

Advanced modifications (Advanced level):

• JavaScript/React development experience   
• Node.js/Express backend knowledge   
• MongoDB/Mongoose database design   
• DevOps for production deployment optimization

Bandwidth and Storage Estimates

Bandwidth requirements:

• Per user session: approximately 2-5 MB   
• 1,000 monthly active users: approximately 50-100 GB bandwidth   
• Recommended: Hosting with unlimited or high bandwidth allocation

Storage requirements:

• Application source files: approximately 50 MB   
• Node modules (dependencies): approximately 300 MB   
• Production build output: approximately 10 MB   
• Database storage (10,000 links + 1M clicks): approximately 500 MB   
• Recommended total for production: 5 GB or more

Additional Notes

• All NPM dependencies included in package.json   
• No additional software purchases required   
• All third-party services offer free tier options   
• Optional services enhance functionality but are not mandatory   
• Compatible with Windows, Linux, and macOS   
• Docker deployment supported (optional)

Installation Guide - From Download to Functional Platform

Estimated Time: 25 minutes to fully functional local platform

Difficulty Level: Beginner-Friendly (No coding required)   

Prerequisites

Prepare these items before beginning installation:

    MongoDB Atlas account (free tier) -

Step 1: Extract Files

1. Extract the downloaded ZIP file to your preferred directory
          
   Example locations: C:ProjectsLinkShield or ~/projects/linkshield   
2. Open terminal or command prompt in the extracted folder
          
   Windows: Shift + Right-click folder, select "Open PowerShell window here"
          
   Mac/Linux: Right-click folder, select "Open Terminal here"

Step 2: Install Dependencies

Install backend dependencies:

npm install

This installs Express, MongoDB driver, authentication libraries, and all backend packages. Wait 2-3 minutes for completion.

Install frontend dependencies:

cd client
npm install
cd ..

This installs React, Tailwind CSS, and all UI components. Wait 2-3 minutes for completion.

Step 3: Configure MongoDB Database

Option A: MongoDB Atlas (Cloud - Recommended, Free Tier Available)

Visit

Option B: Local MongoDB Installation (Advanced Users)

Download MongoDB Community Server from

Step 4: Configure Environment Variables

Copy the example environment file:

Windows:

copy .env.example .env

Mac/Linux:

cp .env.example .env

Open the .env file in any text editor and configure the following:

Database Configuration (Required):

MONGODB_URI=mongodb+srv://your-username:[email protected]/linkshield

Server Configuration (Required):

PORT=5000
NODE_ENV=production
JWT_SECRET=your-secure-random-string-here
JWT_REFRESH_SECRET=another-secure-random-string-here

Email Configuration (Required - Gmail Example):

SMTP_HOST=smtp.gmail.com
SMTP_PORT=587
[email protected]
SMTP_PASS=your-16-digit-app-password
[email protected]
FROM_NAME=LinkShield Pro

Gmail App Password Setup: Visit Google" class="redactor-linkify-object">https://myaccount.google.com/a... App Passwords, enable 2-Step Verification, create an app password for "Mail", and copy the 16-digit code.

Stripe Configuration (Optional - For Payments):

STRIPE_SECRET_KEY=sk_test_your_stripe_secret_key
STRIPE_PUBLISHABLE_KEY=pk_test_your_publishable_key

AI Provider Configuration (Optional - For AI Features):

Option 1 - Mock Provider (No API key needed, for testing):

AI_PROVIDER=mock

Option 2 - OpenAI (When ready for production):

AI_PROVIDER=openai
OPENAI_API_KEY=sk-your_openai_api_key

Save the .env file after configuration.

Step 5: Seed Demo Data (Optional but Recommended)

Load the demo account with realistic data for testing:

npm run seed:demo

This creates:

• Demo account: [email protected] / demo123   
• 15 realistic link campaigns (10 personal + 5 team)   
• 10,485 pre-loaded click analytics   
• Team workspace with collaboration features   
• Geographic data from 12+ countries and 50+ cities

Wait 1-2 minutes for seeding to complete.

Step 6: Start the Application

Development Mode (Recommended for testing):

Open two terminal windows:

Terminal 1 - Backend Server:

npm start

You will see: "Server running on port 5000" and "MongoDB connected"

Terminal 2 - Frontend Development Server:

npm run dev

You will see: "Local: http://localhost:5173"

Production Mode (Single command):

Build the frontend:

npm run build

Start in production mode:

npm start

Step 7: Access Your Platform

Open your web browser and navigate to:

You should see the LinkShield Pro login page.

Step 8: Test the Platform

Option 1: Use Demo Account (if you seeded data)

Login with:

• Email: [email protected]   
• Password: demo123

Explore the dashboard with 10,485 clicks, 15 campaigns, AI insights, team collaboration, and analytics charts.

Option 2: Create Your Own Account   

1. Click "Register" or visit: http://localhost:5000/register   
2. Fill in your name, email, and password   
3. Check your email for the 6-digit verification code   
4. Enter the verification code   
5. Login and start creating links

Troubleshooting

Issue: "Cannot connect to MongoDB"

• Verify MONGODB_URI in .env file is correct   
• Check MongoDB Atlas IP whitelist includes your IP or use 0.0.0.0/0   
• Ensure MongoDB service is running (if self-hosted)

Issue: "SMTP error when sending email"   

• For Gmail: Enable 2-Factor Authentication and create App Password   
• Verify SMTP_USER and SMTP_PASS in .env file   
• Consider using SendGrid as an alternative (free tier available)

Issue: "Port 5000 already in use"

• Change PORT in .env file to 5001 or 3000   
• Or stop the application using port 5000

Issue: "Module not found" errors   

• Run npm install again in the root folder   
• Run npm install in the client folder   
• Delete node_modules and package-lock.json, then reinstall

Next Steps After Installation

1. Review Documentation
          
   • DOCUMENTATION_COMPLETE.md - Complete feature reference           
   • MARKETING_SUCCESS_GUIDE.md - Business launch strategies           
   • EMAIL-CUSTOMIZATION-GUIDE.md - Email template customization    

   

1. Customize Branding
          
   • Update logo files in client/public/ directory           
   • Modify colors in client/tailwind.config.js file           
   • Customize email templates in server/templates/email/ directory           
   • Update company information in legal pages       
      
2. Deploy to Production
          
   • Vercel (easiest): Free tier available, automatic deployments           
   • VPS: DigitalOcean, AWS, Linode for full control           
   • cPanel: Shared hosting with Node.js support       
             

   3. Configure Payment Processing

• Create Stripe account and add production API keys           
• Configure pricing plans in source code           
• Test checkout flow thoroughly       

           

Support Resources 

• Documentation: 250+ pages included in download   
• Support: Contact via Codester messaging (6 months included)   
• Bug Reports: Submit through Codester support system    Live Reference:

www.lnkshield.com (test account creation or demo login)