How to use like GITHUB_SHA environments on Pages?

I’m migrating from Firebase to Pages.
But the build process is failed.

In my Webpack config, using GITHUB_SHA like below but I couldn’t find that value in the documentation. I think Pages CI does not have any provided environment variables.

new RollbarSourceMapPlugin({
  version: process.env.GITHUB_SHA,

Are there any plans for Pages to support these?

I’m not sure if there are any plans to add these sort of environment variables at the minute.

If you’d like to suggest this to the team though, the best way to do that is in the Discord server:

Thank you for supporting me!