github action summary

[stdavis]

          Looks good. Since we're in here do we want to try pushing the deploy result to the GitHub action annotations?

Originally posted by @steveoh in #71 (review)

[steveoh]

Here's some relevant docs

https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/workflow-commands-for-github-actions#adding-a-job-summary

With the general idea being writing to an variable

echo "{markdown content}" >> $GITHUB_STEP_SUMMARY

The purpose was to help understand what's happening in the deploy step.

I wish that we could see the output of this command:

firebase-website-deploy-composite-action/action.yml

Line 111 in 33c293d

RESULTS=$(npx firebase-tools hosting:channel:deploy $GITHUB_HEAD_REF \