feat: implement docker infrastructure (US-001)

- Add docker-compose.yml with postgres, redis, api, and web services
- Add multi-stage Dockerfile for API (Python 3.11)
- Add multi-stage Dockerfile for web (Node.js 20 + nginx)
- Add Makefile with common development commands
- Add .env.example with all required environment variables
- Add placeholder pyproject.toml and package.json for builds
- Configure health checks for all services
- Setup persistent volumes for postgres, redis, and repos
- Run services as non-root users

apps/web/.env.example

@@ -1,8 +0,0 @@
-# Frontend runtime configuration
-VITE_API_URL=http://localhost:8000
-VITE_APP_NAME=Headquarter
-
-# OIDC Authentication (Authentik)
-VITE_OIDC_ISSUER=https://authentik.example.com/application/o/headquarter
-VITE_OIDC_CLIENT_ID=headquarter-web
-VITE_OIDC_REDIRECT_URI=http://localhost:5173/callback