[Chapel Merge] Update CI image builder workflow

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Branch: refs/heads/main
Revision: 6f1c76a
Author: aconsroe-hpe
Link: Update CI image builder workflow by aconsroe-hpe · Pull Request #19448 · chapel-lang/chapel · GitHub
Log Message:

Merge pull request #19448 from aconsroe-hpe/fix/docker-ci-update

Update CI image builder workflow

reviewed by @ronawho

In #19425 I added a new GH Action to build a container. It used the
"on push to main" trigger, but while the new Workflow shows up at [1],
it did not run. I incorrectly assumed we could use variable
substitution in the on.paths section, but I can't get that to work.

I've also added the "on workflow_dispatch" trigger (see [2]) to
allow it to be manually run.

I've tested this in my own fork and verified:

  • a manual run will build the image and push to ghcr
  • a change to util/dockerfiles/github-ci/Dockerfile triggers a
    rebuild after merging to main

[1] Actions · chapel-lang/chapel · GitHub
[2] Events that trigger workflows - GitHub Docs

Modified Files:
M .github/workflows/build-CI-container.yml

Compare: https://github.com/chapel-lang/chapel/compare/4bd353ce8261...6f1c76a283cb