Force HTTPS schema for generated asset URLs to fix Mixed Content blocking

app/Providers/AppServiceProvider.php

@@ -19,6 +19,8 @@ public function register(): void
      */
     public function boot(): void
     {
-        //
+        if (env('APP_ENV') !== 'local') {
+            \Illuminate\Support\Facades\URL::forceScheme('https');
+        }
     }
 }