The default release script doesn't push `main` to stage-beta, so
reintroduce the custom_release script. This script is simplified
however, and doesn't push to the ci/qa environments as those aren't used
by image-builder anyway.
The starter app has been updated over the last few months and new
options are required in the `scripts` section of `package.json`.
Bring the `scripts` section in line with the starter app to fix some
issues around routing requests to `/beta` in CI.
Signed-off-by: Major Hayden <major@redhat.com>