7. Troubleshooting & FAQ

7.1. Common Challenges

Installation Issues

1. Docker Setup Problems

   # Error: Port is already in use
   Error response from daemon: Ports are not available: exposing port TCP 0.0.0.0:80 -> 0.0.0.0:0: listen tcp 0.0.0.0:80: bind: address already in use
   

   Solution:

   # Find process using the port
   sudo lsof -i :80
   
   # Stop the process
   sudo kill -9 <PID>
   

2. Node.js Version Conflicts

   Error: The engine "node" is incompatible with this module
   

   Solution:

   # Use nvm to install correct version
   nvm install 18
   nvm use 18
   
   # Or update package.json
   {
     "engines": {
       "node": ">=18.0.0"
     }
   }
   

[!NOTE] 📸 Screenshot Needed: Common installation error messages and solutions

Environment Configuration

1. Missing Environment Variables

   Error: Missing required environment variable: STRIPE_SECRET_KEY
   

   Solution:

   • Check .env.example files
   • Copy and fill required variables
   • Verify variable names match exactly

2. SSL Certificate Issues

   Error: unable to get local issuer certificate
   

   Solution:

   # Generate new certificates
   ./scripts/generate-certs.sh
   
   # Or use Let's Encrypt
   ./scripts/setup-letsencrypt.sh
   

[!NOTE] 📸 Screenshot Needed: Environment configuration interface

Database Problems

1. Connection Issues

   interface DatabaseError {
     code: string;     // e.g., 'ECONNREFUSED'
     errno: number;    // e.g., -61
     syscall: string;  // e.g., 'connect'
     address: string;  // e.g., '127.0.0.1'
     port: number;     // e.g., 5432
   }
   

   Solutions:

   • Check database service is running
   • Verify connection credentials
   • Ensure network connectivity

2. Migration Failures

   # Reset database
   yarn strapi database:reset
   
   # Rebuild and restart
   docker-compose down
   docker-compose up -d --build
   

[!NOTE] 📊 Diagram Needed: Database troubleshooting flowchart

7.2. Frequently Asked Questions

General Questions

1. Q: How do I update the system?

   # Pull latest changes
   git pull origin main
   
   # Update dependencies
   yarn install
   
   # Rebuild containers
   docker-compose up -d --build
   

2. Q: How do I backup my data?

# Database backup
./scripts/backup-db.sh

# Full system backup
./scripts/backup-system.sh

Development Questions

1. Q: How do I create a custom plugin?

   # Generate plugin
   yarn strapi generate:plugin my-plugin
   
   # Structure
   plugins/my-plugin/
   ├── config/
   ├── controllers/
   ├── models/
   ├── services/
   └── package.json
   

2. Q: How do I customize the frontend theme?

// frontend/src/styles/themin.ts
export const theme = {
  colors: {
    primary: '#007AFF',
    // ... other colors
  },
  // ... other theme properties
};

Security Questions

1. Q: How do I implement rate limiting?

• Check the middleware : backend/src/api/webhook/middlewares/rate-limit.ts, for the implementation code,

  // backend/src/api/webhook/middlewares/rate-limit.ts
  const rateLimiters: Record<RateLimiterType, RateLimiterMemory> = {
   free: new RateLimiterMemory({
     points: 3, // Number of requests
     duration: 86400, // Per day
   }),
   premium: new RateLimiterMemory({
     points: 10, // Number of requests
     duration: 60, // Per day
   }),
   enterprise: new RateLimiterMemory({
     points: 100, // Number of requests
     duration: 60, // Per minute
   }),
   default: new RateLimiterMemory({
     points: 20, // Default number of requests
     duration: 60, // Default duration per minute
   }),
  

2. Q: How do I secure API endpoints?

   // backend/api/route/config/policies.ts
   export default {
     find: ['isAuthenticated', 'rateLimit'],
     findOne: ['isAuthenticated', 'rateLimit'],
     create: ['isAuthenticated', 'isAdmin'],
     update: ['isAuthenticated', 'isAdmin'],
     delete: ['isAuthenticated', 'isAdmin'],
   };
   

Integration Questions

1. Q: How do I integrate with external APIs?

   // frontend/src/services/api.ts
   export class ExternalAPIService {
     constructor(config: APIConfig) {
       this.baseURL = config.baseURL;
       this.apiKey = config.apiKey;
     }
     
     async request<T>(endpoint: string): Promise<T> {
       // Implementation
     }
   }
   

[!NOTE] 📸 Screenshot Needed: FAQ section in documentation portal