- Replace pip with UV for faster dependency installation
- Switch base image from python:3.11-slim to debian:bookworm-slim
- Add SECURE_PROXY_SSL_HEADER for production SSL proxy support
- Optimize Docker layer caching by copying dependency files first
- Move database migration to build time for faster container startup
- Enhance Gunicorn logging with access and error log streams
- Update dependency management from requirements.txt to pyproject.toml
These changes improve build performance, production security, and
container startup time while modernizing the dependency management
workflow.