How to setup GHCR for kasm workspace images

how_to_setup_GHCR_for_kasm_workspace_images.md

Steps:

1. Generate personal access token for GitHub Container Registry to be used as ghcr token
2. Add ghcr token, GHCR_AUTH_TOKEN, as secret in repo settings
3. Enable workflows in GitHub Actions
4. Push to repo to trigger GitHub Actions
5. Enable ghcr in GitHub Packages
6. Set publicity to "public"

References:

• https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry