chore: use url() method directly (#1415)

Author: ArianSha

apps/nextjs/src/env.ts

@@ -16,7 +16,7 @@ export const env = createEnv({
    * This way you can ensure the app isn't built with invalid env vars.
    */
   server: {
-    POSTGRES_URL: z.string().url(),
+    POSTGRES_URL: z.url(),
   },
 
   /**