Update compose files

docker-compose.ci.yml

@@ -1,3 +1,6 @@
-web:
+version: '3.8'
+
+services:
+  web:
     env_file:
       - development.env.template

docker-compose.override.yml

@@ -1,6 +1,12 @@
-web:
+version: '3.8'
+
+services:
+  web:
     volumes:
       - .:/home/app/wedding
-    - /usr/local/bundle
+      - web_bundle:/usr/local/bundle
     env_file:
       - development.env
+
+volumes:
+  web_bundle:

docker-compose.yml

@@ -1,11 +1,14 @@
-db:
+version: '3.8'
+
+services:
+  db:
     image: postgres:10
     environment:
       POSTGRES_HOST_AUTH_METHOD: trust
     ports:
       - '5432:5432'
 
-web:
+  web:
     build: .
     ports:
       - '3000:3000'