Update docker-compose.yml (#20)

Use "postgres-data" instead of "postgres-data-dev" for volume in service postgres.

docker-compose.yml

@@ -13,7 +13,7 @@ services:
       - POSTGRES_USER=${POSTGRES_USER:-postgres}
       - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-password}
     volumes:
-      - postgres-data-dev:/var/lib/postgresql/data
+      - postgres-data:/var/lib/postgresql/data
 
   redis:
     image: ${REDIS_DOCKER_IMAGE:-redis:6.2-alpine}