feat: Fix Docker configuration and update documentation

- Fix nginx port mapping (12000:80) for single port exposure
- Remove backend port exposure (internal network only)
- Fix nginx configuration (remove invalid must-revalidate directive)
- Update README with correct setup instructions
- Update TODO.md with completed tasks and current status
- Application now running on http://localhost:12000 with production build

README.md

@@ -64,13 +64,14 @@ A comprehensive SAAS application for managing recruiter workflows, built with mo
 3. **Start the application with Docker (recommended for parity)**
    This single command builds the images, starts all services, runs database migrations, and seeds the database with sample data.
    ```bash
-   docker-compose up --build
+   POSTGRES_PASSWORD=merchantsofhope_dev_password JWT_SECRET=merchantsofhope_dev_jwt_secret_key_2025 docker compose up --build -d
    ```
 
 4. **Access the application**
-   - Frontend: http://localhost:12000
-   - Backend API: http://localhost:3001 (from host) or `http://merchantsofhope-supplyanddemandportal-backend:3001` (from other containers)
-   - Database: merchantsofhope-supplyanddemandportal-database:5432 (inside Docker network)
+   - **Frontend**: http://localhost:12000 (React app with nginx)
+   - **API**: http://localhost:12000/api/* (proxied to backend)
+   - **Backend**: Not directly accessible (internal Docker network only)
+   - **Database**: Internal Docker network only
 
 ### Environment Variables