- Add multi-stage Dockerfile with 'ext' stage for CI compatibility
- Fix start-runtime.js to use 'npm start' instead of 'node server.js'
- Ensure image can be built with target stage 'ext' as expected by CI
- Maintain runtime environment variable injection capability
- Add Dockerfile.ci for generic builds without hardcoded environment variables
- Add start-runtime.js script to inject NEXT_PUBLIC_* variables at runtime
- Add .env.example with default values for development
- Remove dependency on build-time ARG variables for CI compatibility
- Image can now be deployed to any environment with different variables
