add commento

postgres/docker-compose.yml

@@ -1,11 +1,13 @@
-postgres:
-  image: postgres:13-alpine
-  ports:
-    - "5432:5432"
-  volumes:
-    - ./data:/var/lib/postgresql/data
-  environment:
-    - POSTGRES_USER=postgres
-    - POSTGRES_PASSWORD=postgres
-    - POSTGRES_DB=postgres
-  restart: unless-stopped
+version: "3.8"
+services:
+  postgres:
+    image: postgres:alpine
+    ports:
+      - "5432:5432"
+    volumes:
+      - ./data:/var/lib/postgresql/data
+    environment:
+      - POSTGRES_USER=postgres
+      - POSTGRES_PASSWORD=postgres
+      - POSTGRES_DB=postgres
+    restart: unless-stopped