Consistent deploy with GitHub Actions

Prerequirements

You must finish the followings beforehand.

• Manual deploy with GitHub Actions

How to set up

1. Confirm whether .github/workflows/deploy.yml exists or not. If no, create the file with the content
2. Comment-in the following lines with your favorite time with UTC

schedule:
  - cron: '0 8 * * 1' # 8am (Mon) UTC