chore: used a more general base image for postgres

Author: kasir-barati

documentation/docs/introduction/example.mdx

@@ -574,7 +574,7 @@ Create a `compose.yml` file in the root of the project
 ```dockerfile
 services:
   postgres:
-    image: "postgres:17.0-alpine3.20"
+    image: "postgres:17"
     environment:
       - "POSTGRES_USER=gettingstarted"
       - "POSTGRES_DB=gettingstarted"