1e7c5855e5
Use self-hosted mirrors for checkout, setup-node, upload-artifact, and download-artifact. Pin upload/download to v3 so artifact uploads work on runners that do not support @actions/artifact v2 (GHES-style); set download path to the workspace root for the release upload script. Reviewed-on: #10 Co-authored-by: keligrubb <keligrubb324@gmail.com> Co-committed-by: keligrubb <keligrubb324@gmail.com>