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>

backend/package.json

@@ -0,0 +1,64 @@
+{
+  "name": "trenes-backend",
+  "version": "1.0.0",
+  "description": "Backend API y Worker para sistema de tracking de trenes en tiempo real",
+  "main": "src/api/server.js",
+  "type": "module",
+  "scripts": {
+    "dev": "nodemon src/api/server.js",
+    "dev:worker": "nodemon src/worker/gtfs-poller.js",
+    "dev:gtfs-static": "nodemon src/worker/gtfs-static-syncer.js",
+    "dev:trip-updates": "nodemon src/worker/trip-updates-poller.js",
+    "dev:alerts": "nodemon src/worker/alerts-poller.js",
+    "dev:analytics": "nodemon src/worker/analytics-refresher.js",
+    "start": "node src/api/server.js",
+    "start:worker": "node src/worker/gtfs-poller.js",
+    "start:gtfs-static": "node src/worker/gtfs-static-syncer.js",
+    "start:trip-updates": "node src/worker/trip-updates-poller.js",
+    "start:alerts": "node src/worker/alerts-poller.js",
+    "start:analytics": "node src/worker/analytics-refresher.js",
+    "test": "NODE_ENV=test jest",
+    "lint": "eslint src/**/*.js",
+    "format": "prettier --write src/**/*.js"
+  },
+  "keywords": [
+    "renfe",
+    "gtfs",
+    "gtfs-rt",
+    "trains",
+    "real-time"
+  ],
+  "author": "",
+  "license": "MIT",
+  "dependencies": {
+    "express": "^4.18.2",
+    "fastify": "^4.25.2",
+    "@fastify/cors": "^8.5.0",
+    "@fastify/websocket": "^8.3.1",
+    "socket.io": "^4.6.1",
+    "pg": "^8.11.3",
+    "redis": "^4.6.12",
+    "gtfs-realtime-bindings": "^1.1.0",
+    "node-fetch": "^3.3.2",
+    "dotenv": "^16.3.1",
+    "pino": "^8.17.2",
+    "pino-pretty": "^10.3.1",
+    "csv-parse": "^5.5.3",
+    "adm-zip": "^0.5.10",
+    "node-cron": "^3.0.3",
+    "express-rate-limit": "^7.1.5",
+    "helmet": "^7.1.0",
+    "express-validator": "^7.0.1",
+    "hpp": "^0.2.3",
+    "unzipper": "^0.12.3"
+  },
+  "devDependencies": {
+    "nodemon": "^3.0.2",
+    "eslint": "^8.56.0",
+    "prettier": "^3.1.1",
+    "jest": "^29.7.0"
+  },
+  "engines": {
+    "node": ">=20.0.0"
+  }
+}