Enhance Docker and backend configurations for improved deployment

- Updated docker-compose.yml to include environment variable support for services, enhancing flexibility in configuration.
- Refactored Dockerfile to utilize build arguments for VITE environment variables, allowing for better customization during builds.
- Improved Nginx configuration to handle larger video uploads by increasing client_max_body_size to 5GB.
- Enhanced backend Dockerfile to include wget for health checks and improved startup logging for database migrations.
- Added validation for critical environment variables in the backend to ensure necessary configurations are present before application startup.
- Updated content streaming logic to support direct HLS URL construction, improving streaming reliability and user experience.
- Refactored various components and services to streamline access checks and improve error handling during content playback.

src/types/content.ts

@@ -28,6 +28,9 @@ export interface Content {
   // Dual-mode content delivery
   deliveryMode?: 'native' | 'partner'
   keyUrl?: string
+
+  /** True when the logged-in user is the content creator/owner */
+  isOwnProject?: boolean
 }
 
 // Nostr event types