update error message to be more specific

src/init/features/hosting/github.ts

@@ -56,7 +56,7 @@ export async function initGitHub(setup: Setup, config: any, options: any): Promi
 
   if (!setup.config.hosting) {
     return reject(
-      `The project is not setup with Hosting, Please use ${bold("firebase init hosting")} instead`,
+      `Didn't find a Hosting config in firebase.json. Run ${bold("firebase init hosting")} instead.`,
       { exit: 1 }
     );
   }