feat: migración a PostgreSQL, tiempo real SSE, Dockerfile y compose para Coolify

docker-compose.yml

@@ -0,0 +1,43 @@
+services:
+  web:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    ports:
+      - "3000:3000"
+    environment:
+      - NODE_ENV=production
+      - PORT=3000
+      - DATABASE_URL=postgresql://${POSTGRES_USER:-postgres}:${POSTGRES_PASSWORD:-postgres_password_e3}@db:5432/${POSTGRES_DB:-encuesta_e3}
+      - ADMIN_SECRET=${ADMIN_SECRET:-RESETEOE3}
+    depends_on:
+      db:
+        condition: service_healthy
+    networks:
+      - app-network
+
+  db:
+    image: postgres:16-alpine
+    ports:
+      - "5432:5432"
+    environment:
+      - POSTGRES_DB=${POSTGRES_DB:-encuesta_e3}
+      - POSTGRES_USER=${POSTGRES_USER:-postgres}
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-postgres_password_e3}
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U $${POSTGRES_USER:-postgres} -d $${POSTGRES_DB:-encuesta_e3}"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+      start_period: 10s
+    networks:
+      - app-network
+
+networks:
+  app-network:
+    driver: bridge
+
+volumes:
+  postgres_data: