Add AETHERA_ prefixed env vars for server configuration:
- AETHERA_DATA_DIR: data directory path
- AETHERA_LISTEN: listen address
- AETHERA_PORT: listen port
Env vars take precedence over defaults but CLI flags override both.
- Add Dockerfile for containerized deployment
- Add .drone.yml for CI/CD pipeline configuration
- Add docker and docker-run targets to Makefile
- Configure port 8080 binding and persistent volume mount
- Upgrade to Tailwind CSS v4.2.0 with explicit CLI dependency
- Add @tailwindcss/cli and tailwindcss as devDependencies
- Update build scripts to use bunx @tailwindcss/cli
- Include new transitive dependencies for enhanced CSS processing
