Tweak compose files

Author: benjaminwood

Diff for: docker-compose.codespaces.yml

@@ -13,4 +13,5 @@ services:
     init: true
 
 volumes:
+  gems:
   history:

Diff for: docker-compose.yml

@@ -3,9 +3,10 @@ version: '3.7'
 services:
   postgres:
     image: postgres:latest
+    environment:
+      - POSTGRES_HOST_AUTH_METHOD=trust
     volumes:
       - postgres-data:/var/lib/postgresql/data
-  
+
 volumes:
-  postgres-data:
-  gems:
+  postgres-data: