C2LC-25: Set up deployment of "production" c2lc-coding-environment to build.codelearncreate.org

Description

Set up deployment of the “production” branch of https://github.com/codelearncreate/c2lc-coding-environment to a static site host at https://build.codelearncreate.org/

The application is a React web app and can be built with npm run build with the CI environment variable set. We have a CI build configured using GitHub Actions with more details:

https://github.com/codelearncreate/c2lc-coding-environment/blob/dev-0.1/.github/workflows/ci.yaml

The smallest amount of work would be to reuse what we have currently for https://prototype.codelearncreate.org/

We could also look at triggering Jenkins from GitHub Actions (rather than web hook) or at deploying to Netlify from GitHub Actions.