chore: Remove Dockerfile and docker-compose.yml, update README and migration guide for backend log checks

docs/deployment/web_architecture.md

@@ -8,7 +8,6 @@ The application has been migrated from PyQt6 desktop app to a modern web-based a
 
 - **Frontend**: React + TypeScript + Material-UI
 - **Backend**: FastAPI (Python)
-- **Deployment**: Docker
 
 ## Architecture
 
@@ -52,17 +51,6 @@ The application has been migrated from PyQt6 desktop app to a modern web-based a
    - API Docs: http://localhost:8000/docs
    - API: http://localhost:8000/api
 
-### Docker Deployment
-
-1. **Build and Run**:
-   ```bash
-   docker-compose up --build
-   ```
-
-2. **Access Application**:
-   - Application: http://localhost:8000
-   - API Docs: http://localhost:8000/docs
-
 ## API Endpoints
 
 ### Trading
@@ -114,24 +102,9 @@ VITE_WS_URL=ws://localhost:8000/ws/
 DATABASE_URL=sqlite:///./data/crypto_trader.db
 ```
 
-### Docker Environment
-
-Environment variables can be set in `docker-compose.yml`:
-
-```yaml
-environment:
-  - DATABASE_URL=sqlite:///./data/crypto_trader.db
-  - PYTHONPATH=/app
-```
-
 ## Data Persistence
 
-Data is stored in the `./data` directory, which is mounted as a volume in Docker:
-
-```yaml
-volumes:
-  - ./data:/app/data
-```
+Data is stored in the `~/.local/share/crypto_trader/` directory following XDG Base Directory Specification.
 
 ## Development
 
@@ -168,23 +141,6 @@ volumes:
 
 ## Production Deployment
 
-### Docker Production
-
-1. Build production image:
-   ```bash
-   docker build -t crypto-trader:latest .
-   ```
-
-2. Run container:
-   ```bash
-   docker run -d \
-     -p 8000:8000 \
-     -v $(pwd)/data:/app/data \
-     -v $(pwd)/config:/app/config \
-     --name crypto-trader \
-     crypto-trader:latest
-   ```
-
 ### Reverse Proxy (Nginx)
 
 Example Nginx configuration:
@@ -228,9 +184,9 @@ Only the UI layer has been replaced with a web interface.
 
 ### Backend Issues
 
-- **Port already in use**: Change port in `docker-compose.yml` or use `--port` flag
-- **Database errors**: Check database file permissions in `./data` directory
-- **Import errors**: Ensure `PYTHONPATH=/app` is set
+- **Port already in use**: Use `--port` flag to specify a different port
+- **Database errors**: Check database connection string and permissions
+- **Import errors**: Ensure virtual environment is activated and dependencies are installed
 
 ### Frontend Issues
 
@@ -238,20 +194,13 @@ Only the UI layer has been replaced with a web interface.
 - **WebSocket connection fails**: Verify WebSocket URL and backend is running
 - **Build errors**: Clear `node_modules` and reinstall: `rm -rf node_modules && npm install`
 
-### Docker Issues
-
-- **Build fails**: Check Dockerfile syntax and dependencies
-- **Container won't start**: Check logs: `docker-compose logs`
-- **Volume permissions**: Ensure `./data` directory is writable
-
 ## Benefits of Web Architecture
 
 1. **Modern UI**: Access to entire web ecosystem (Material-UI, charts, etc.)
 2. **Cross-platform**: Works on any device with a browser
-3. **Easier deployment**: Docker is simpler than AppImage
-4. **Better development**: Hot-reload, better tooling
-5. **Maintainability**: Easier to update and deploy
-6. **Accessibility**: Access from anywhere via browser
+3. **Better development**: Hot-reload, better tooling
+4. **Maintainability**: Easier to update and deploy
+5. **Accessibility**: Access from anywhere via browser
 
 ## Next Steps