Add OpenAI-compatible API and Docker deployment

- Add FastAPI-based API in whisperx/api/
- Implement transcription endpoint compatible with OpenAI
- Added Dockerfile and docker-compose.yml for easy deployment
- Updated README with Docker instructions
- Added new script whisperx-serve for running the API

.dockerignore

@@ -0,0 +1,27 @@
+.git
+__pycache__
+*.pyc
+*.pyo
+*.pyd
+.Python
+.pytest_cache
+.coverage
+htmlcov
+.env
+.venv
+venv/
+ENV/
+env/
+
+# Docker
+Dockerfile*
+docker-compose*.yml
+.dockerignore
+
+# IDE
+.vscode
+.idea
+
+# OS
+.DS_Store
+*.log