Follow PostgreSQL image update

it requires password or to make the mode "trust".

Author: ohbarye

docker-compose.yml

@@ -5,6 +5,8 @@ services:
     image: postgres:11
     volumes:
       - ./tmp/db:/var/lib/postgresql/data
+    environment:
+      POSTGRES_HOST_AUTH_METHOD: trust
   backend:
     container_name: backend
     build: ./backend