[Website] Make deployment script more usable for self-hosting #2764
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Motivation for the change, related issues
The Telex project wants to self-host Playground and pin it to a specific version. This is a PR to make deployment to WP Cloud easier for folks like them.
Implementation details
This PR:
GIT_REF_TO_DEPLOYvar so users can configure the workflow environment to deploy a specific branch, tag, or revision.CORS_PROXY_URLvar to allow folks to choose their CORS proxy.Testing Instructions (or ideally a Blueprint)