If you want to take a Laravel Vapor app down temporarily, you run this command from within the app:
vapor down production # this is for environment called "production"
To bring it back up, you run:
vapor up production
While it’s down, Vapor will show a general maintenance mode page. A lot of tutorials tell you to customize this by writing a view at
resources/views/errors/503.blade.php. However, this isn’t the case for Laravel Vapor.
On Vapor, you customize this by putting a file called
503.html at the root of your application (not in the
resources/views/ folder — at the root, outside any folders).
Inside this self-contained file, write the plain HTML that you want to be shown when your app is in maintenance mode.