feat: Initial commit - Train tracking system

Complete real-time train tracking system for Spanish railways (Renfe/Cercanías):

- Backend API (Node.js/Express) with GTFS-RT polling workers
- Frontend dashboard (React/Vite) with Leaflet maps
- Real-time updates via Socket.io WebSocket
- PostgreSQL/PostGIS database with Flyway migrations
- Redis caching layer
- Docker Compose configuration for development and production
- Gitea CI/CD workflows (lint, auto-tag, release)
- Production deployment with nginx + Let's Encrypt SSL

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,59 @@
+# Node.js
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Build outputs
+dist/
+build/
+.vite/
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Logs
+*.log
+logs/
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Environment files (may contain secrets)
+.env
+.env.local
+.env.production
+.env.*.local
+
+# Testing
+coverage/
+.nyc_output/
+
+# Docker volumes (local data)
+postgres_data/
+redis_data/
+
+# GTFS data downloads
+gtfs_data/
+*.zip
+*.pb
+
+# SSL certificates (local dev only)
+nginx/ssl/
+
+# Temporary files
+tmp/
+temp/
+*.tmp
+
+# Database dumps
+*.sql
+*.dump
+
+# Claude
+.claude/