Updates to GitHub Actions example

[jcohen02]

This PR makes updates to the GitHub Actions example to address the error raised in issue #220 and make the suggested changes raised in #256.

Closes #220
Closes #256

[github-actions]

Thank you!

Thank you for your pull request 😃

🤖 This automated message can help you check the rendered files in your submission for clarity. If you have any questions, please feel free to open an issue in {sandpaper}.

If you have files that automatically render output (e.g. R Markdown), then you should check for the following:

• 🎯 correct output
• 🖼️ correct figures
• ❓ new warnings
• ‼️ new errors

Rendered Changes

🔍 Inspect the changes: https://github.com/carpentries-incubator/docker-introduction/compare/md-outputs..md-outputs-PR-257

The following changes were observed in the rendered markdown documents:

 docker-hub.md         |   2 +-
 e01-github-actions.md | 114 ++++++++++++++++++++++++++++----------------------
 introduction.md       |  13 ++++++
 md5sum.txt            |   6 +--
 4 files changed, 81 insertions(+), 54 deletions(-)

What does this mean?

If you have source files that require output and figures to be generated (e.g. R Markdown), then it is important to make sure the generated figures and output are reproducible.

This output provides a way for you to inspect the output in a diff-friendly manner so that it's easy to see the changes that occur due to new software versions or randomisation.

⏱️ Updated at 2024-10-21 22:56:36 +0000

[sstevens2]

These changes look great to me. Since it is an optional episode, I'm going to be a bit risky and merge it. I've not tested the actions content directly described here but would like to get these changes merged before our workshop starting tomorrow. I'll test it out during the workshop Thursday if not sooner.