컨테이너 변경 및 .env 적용

docker-compose.yml

@@ -1,15 +1,17 @@
-version: '3.8'
+version: "3.8"
 
 services:
   web:
     build:
       context: ./sso-demo
       dockerfile: ../Dockerfile
-    container_name: sso-demo-container
+    container_name: sso-express
     ports:
       - "3000:3000"
     volumes:
       - ./sso-demo:/usr/src/app
       - /usr/src/app/node_modules
+    env_file:
+      - .env
     environment:
       - NODE_ENV=development