Update postgres Docker tag to v18

uniproject-renovate[bot] · web-flow · commit 39f6c6ef2b1f · 2026-01-14T08:01:30.000Z
diff --git a/docker-compose.prod.yaml b/docker-compose.prod.yaml
@@ -6,7 +6,7 @@ services:
     restart: always
     env_file: .env
   postgres:
-    image: postgres:17.4
+    image: postgres:18.0
     container_name: postgres
     environment:
       - POSTGRES_USER=root
