feat: add Docker support and update backend dependencies

- Introduced `requirements.docker.txt` for Docker-specific dependencies.
- Updated `requirements.txt` to include `psycopg[binary]` and `python-multipart`.
- Enhanced test suite in `test_main_endpoints.py` to cover document CRUD operations.
- Modified `docker-compose.yml` to include PostgreSQL and frontend services.
- Added Nginx configuration for reverse proxying API requests.
- Refactored file handling in Vue components to support new document storage backend.
- Created new utility functions in `docsApi.js` for document management.
- Updated configuration to support new API endpoints for document operations.
- Adjusted Vite configuration to proxy API requests to the local backend.

.env.example

@@ -8,6 +8,12 @@ VITE_TTS_STATUS_URL=
 VITE_TTS_CONFIG_URL=
 VITE_ASR_URL=
 VITE_JOB_LOAD_URL=
+VITE_DOCS_NODES_URL=
+VITE_DOCS_FOLDERS_URL=
+VITE_DOCS_TEXT_FILES_URL=
+VITE_DOCS_UPLOAD_URL=
+VITE_DOCS_BLOB_BASE_URL=
+VITE_DOCS_NODES_BASE_URL=
 VITE_PRO_FRONTEND_TIMEOUT_MS=3660000
 
 # Document block compression context limit (characters)