Deploying custom domain in CI

[nake89]

Currently a custom domain is deployed during. This is unnecessary. Because the custom domain is not used. Instead we just use the default endpoint given by AWS. Also, this slows down stack deletion (in fact, it has to be done manually. because cloudformation stack delete just wont do it (probably should also research that).

Research how to not deploy domain in CI. Conditionals in serverless.yaml? CLI option? etc