Fixed Docker build issues to complete UV migration.
## Changes
### README.md
- Created backend README.md (required by hatchling build system)
- Simple quick start guide referencing CLAUDE.md
### Dockerfile
- Added `build-essential` for compiling native extensions (pendulum Rust code)
- Updated copy steps to include README.md in both dev and prod stages
- Dockerfile now successfully builds both development and production images
### .dockerignore
- Added exception `!README.md` to allow README.md through
- Keeps other *.md files excluded as intended
## Testing
- ✅ Development image builds successfully (paper-dynasty-backend:dev-uv)
- ✅ Production image builds successfully (paper-dynasty-backend:prod-uv)
- ✅ Container starts and UV installs dependencies correctly
- ✅ Application attempts to start (fails only on missing .env, as expected)
## Build Results
- Dev image: 73 packages installed (with dev deps)
- Prod image: 57 packages installed (no dev deps)
- Both stages use `uv sync --frozen` for reproducible builds
- Build time: ~1-2 minutes per stage
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Add comprehensive project documentation and Docker infrastructure for
Paper Dynasty Real-Time Game Engine - a web-based multiplayer baseball
simulation platform replacing the legacy Google Sheets system.
Documentation Added:
- Complete PRD (Product Requirements Document)
- Project README with dual development workflows
- Implementation guide with 5-phase roadmap
- Architecture docs (backend, frontend, database, WebSocket)
- CLAUDE.md context files for each major directory
Infrastructure Added:
- Root docker-compose.yml for full stack orchestration
- Dockerfiles for backend and both frontends (multi-stage builds)
- .dockerignore files for optimal build context
- .env.example with all required configuration
- Updated .gitignore for Python, Node, Nuxt, and Docker
Project Structure:
- backend/ - FastAPI + Socket.io game engine (Python 3.11+)
- frontend-sba/ - SBA League Nuxt 3 frontend
- frontend-pd/ - PD League Nuxt 3 frontend
- .claude/implementation/ - Detailed implementation guides
Supports two development workflows:
1. Local dev (recommended): Services run natively with hot-reload
2. Full Docker: One-command stack orchestration for testing/demos
Next: Phase 1 implementation (backend/frontend foundations)
