fix: add PORT to docker-compose environment block

Author: yash-pouranik

docker-compose.yml

@@ -1,4 +1,3 @@
-version: '3.9'
 
 services:
   # ── MongoDB ───────────────────────────────────────────────────────────────────
@@ -13,7 +12,7 @@ services:
 
   # ── Redis ─────────────────────────────────────────────────────────────────────
   redis:
-    image: redis:7-alpine
+    image: redis:latest
     container_name: urbackend_redis
     restart: unless-stopped
     ports:
@@ -34,12 +33,14 @@ services:
       - mongo
       - redis
     env_file:
-      - .env
+      - path: .env
+        required: false
     environment:
       # Override DB URLs to use Docker service names
       MONGO_URL: mongodb://mongo:27017/urbackend
       REDIS_URL: redis://redis:6379
       NODE_ENV: production
+      PORT: 1234
 
 volumes:
   mongo_data: