Update dockerfile with explicit ruby, bundler versions

[charles-uno]

The newest version of Bundler requires Ruby 3. This breaks our Docker workflow for local development.

I first tried bumping up to Ruby 3, but ran into the same problem described here. The fix seems to be updating to a newer Jekyll. However, when I try that, I run into version conflicts in Liquid (more info here).

Easiest way forward is to keep using Ruby 2 for now. Updated the Dockerfile to be explicit about Ruby and Bundler versions rather than using the most recent.

My guess is that GitHub Pages is doing the same in prod. But it would be nice to confirm. We'll see if I can figure out how to expose versions for the underlying Ruby, Bundler, and/or Jekyll.

[charles-uno]

There is a plugin that allows you to see the version of your repo: https://github.com/rob-murray/jekyll-version-plugin/blob/master/lib/jekyll_version_plugin.rb

In principle we could hack that to run gem list instead

[charles-uno]

Sorry for the auto-indent noise. This is what I added:

[agude]

Can we add a Prod check around the debug?

{% if jekyll.environment != "production" %}
  <div class="debug">
      <p>Jekyll version: {{ site.github.versions.jekyll }}</p>
      <p>Liquid version: {{ site.github.versions.liquid }}</p>
      <p>Jekyll environment: {{ jekyll.environment }}</p>
    </div>
{% endif %}

[charles-uno]

Can we add a Prod check around the debug?

I want it in prod though. I want to see what versions GitHub pages is running. Could throw display:none on there if the temporary ugliness bothers you?

[agude]

Ah didn't realize that was the intent! 🤣 Looks fine then!

…

On Thu, Dec 28, 2023, 18:49 Charles Fyfe ***@***.***> wrote: Can we add a Prod check around the debug? <https://jekyllrb.com/docs/step-by-step/10-deployment/#environments> I want it in prod though. I want to see what versions GitHub pages is running. Could throw display:none on there if the temporary ugliness bothers you? — Reply to this email directly, view it on GitHub <#123 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABCZYYG7YF4BM5FKER3OCZ3YLYVULAVCNFSM6AAAAABBF5GJC6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTQNZRGY4TAMBQGQ> . You are receiving this because your review was requested.Message ID: ***@***.***>