Remove postgres healthcheck (it gets overriden by mariadb)

overrides/compose.postgres.yaml

@@ -4,15 +4,10 @@ services:
       DB_HOST: db
       DB_PORT: 5432
     depends_on:
-      db:
-        condition: service_healthy
+      - db
 
   db:
-    image: postgres:14.1
-    healthcheck:
-      test: pg_isready
-      interval: 1s
-      retries: 15
+    image: postgres:13.5
     command: []
     environment:
       POSTGRES_PASSWORD: ${DB_PASSWORD:?No db password set}