chore(deps): update postgres docker tag to v16 (#80)

Co-authored-by: Renovate Bot <[email protected]>

docker-compose.yaml

@@ -28,7 +28,7 @@ services:
 
   db:
     # See more: https://hub.docker.com/_/postgres
-    image: "postgres:15.3"
+    image: "postgres:16.4"
     restart: always
     # The commits were slow on our servers, so we turned off the synchronous_commit
     command: postgres -c synchronous_commit=off