Do not pin the minor PostreSQL version

Co-authored-by: Joachim Jablon <[email protected]>

Author: abitrolly

docker-compose.yml

@@ -24,7 +24,7 @@ services:
       - ./dev/vault:/etc/vault
 
   db:
-    image: postgres:10.18
+    image: postgres:10
     ports:
       # 5432 may already in use by another PostgreSQL on host
       - "5433:5432"