reorganizing build scripts

docker-compose_db_only.yml

@@ -0,0 +1,14 @@
+services:
+  db:
+    image: postgres:16
+    ports:
+      - 5432:5432
+    volumes:
+      - postgres_data:/var/lib/postgresql/data/
+    environment:
+      - "POSTGRES_HOST_AUTH_METHOD=trust"
+
+volumes:
+  postgres_data:
+    labels:
+      - "db_is_resettable_via_script"