Custom domain being overwriten

[arafai]

hi @yurikoval,

Firstly, thanks for creating and maintaining the Github action, it's very useful, thank you!

I was wondering if you'd be open to adding another feature: custom domain.
I set the custom domain on the Settings page but each time when it gets deployed, it gets overwritten.

The following would be required:

• add another parameter to the Github Action, CUSTOM_DOMAIN where the user can add his custom domain ( eg: api.mydomain.com)
• if CUSTOM_DOMAIN param is set, create a file named CNAME in the root directory with the CUSTOM_DOMAIN value as a single line (api.mydomain.com)

What do you think?

Kind regards,
Andrei

[arafai]

@yurikoval I've created a PR, please review: #7