Docker; ruby 3.2.4 or 2.7.7?

[JPHutchins]

I built the website manually, and that was OK. When trying to use docker I get

docker run --rm -i -t --publish=4000:4000 --volume ${PWD}:/memfault/interrupt memfault/interrupt
Calling `DidYouMean::SPELL_CHECKERS.merge!(error_name => spell_checker)' has been deprecated. Please call `DidYouMean.correct_error(error_name, spell_checker)' instead.
Configuration file: /memfault/interrupt/_config.yml
            Source: /memfault/interrupt
       Destination: /memfault/interrupt/_site
 Incremental build: disabled. Enable with --incremental
      Generating...
              Lunr: Search index generation disabled. Enable by setting 'GENERATE_SEARCH_INDEX=true' environment variable.
  Liquid Exception: undefined method `tainted?' for {"name"=>"François Baldassari", "email"=>"[email protected]", "web"=>"https://twitter.com/baldassarifr", "image"=>"/img/author/francois.jpg", "blurb"=>"has worked on the embedded software teams at Sun, Pebble, and Oculus. He is currently the CEO of <a href='https://memfault.com'>Memfault</a>.", "twitter"=>"baldassarifr", "linkedin"=>"https://www.linkedin.com/in/francois-baldassari", "github"=>"franc0is"}:Hash in /memfault/interrupt/_layouts/post.html
bundler: failed to load command: jekyll (/usr/local/bundle/bin/jekyll)
/usr/local/bundle/gems/liquid-4.0.3/lib/liquid/variable.rb:124:in `taint_check': undefined method `tainted?' for {"name"=>"François Baldassari", "email"=>"[email protected]", "web"=>"https://twitter.com/baldassarifr", "image"=>"/img/author/francois.jpg", "blurb"=>"has worked on the embedded software teams at Sun, Pebble, and Oculus. He is currently the CEO of <a href='https://memfault.com'>Memfault</a>.", "twitter"=>"baldassarifr", "linkedin"=>"https://www.linkedin.com/in/francois-baldassari", "github"=>"franc0is"}:Hash (NoMethodError)

      return unless obj.tainted?
                       ^^^^^^^^^
        from /usr/local/bundle/gems/liquid-4.0.3/lib/liquid/variable.rb:89:in `render'
        from /usr/local/bundle/gems/liquid-4.0.3/lib/liquid/tags/assign.rb:26:in `render'
        from /usr/local/bundle/gems/liquid-4.0.3/lib/liquid/block_body.rb:103:in `render_node_to_output'
        from /usr/local/bundle/gems/liquid-4.0.3/lib/liquid/block_body.rb:91:in `render'
        from /usr/local/bundle/gems/liquid-4.0.3/lib/liquid/template.rb:208:in `block in render'
        from /usr/local/bundle/gems/liquid-4.0.3/lib/liquid/template.rb:242:in `with_profiling'
        from /usr/local/bundle/gems/liquid-4.0.3/lib/liquid/template.rb:207:in `render'
        from /usr/local/bundle/gems/liquid-4.0.3/lib/liquid/template.rb:220:in `render!'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/liquid_renderer/file.rb:39:in `block (3 levels) in render!'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/liquid_renderer/file.rb:59:in `measure_counts'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/liquid_renderer/file.rb:38:in `block (2 levels) in render!'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/liquid_renderer/file.rb:63:in `measure_bytes'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/liquid_renderer/file.rb:37:in `block in render!'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/liquid_renderer/file.rb:70:in `measure_time'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/liquid_renderer/file.rb:36:in `render!'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/renderer.rb:131:in `render_liquid'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/renderer.rb:194:in `render_layout'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/renderer.rb:163:in `place_in_layouts'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/renderer.rb:93:in `render_document'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/renderer.rb:63:in `run'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/site.rb:547:in `render_regenerated'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/site.rb:532:in `block (2 levels) in render_docs'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/site.rb:531:in `each'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/site.rb:531:in `block in render_docs'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/site.rb:530:in `each_value'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/site.rb:530:in `render_docs'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/site.rb:210:in `render'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/site.rb:80:in `process'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/command.rb:28:in `process_site'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/commands/build.rb:65:in `build'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/commands/build.rb:36:in `process'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/command.rb:91:in `block in process_with_graceful_fail'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/command.rb:91:in `each'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/command.rb:91:in `process_with_graceful_fail'
        from /usr/local/bundle/gems/jekyll-4.2.1/lib/jekyll/commands/serve.rb:86:in `block (2 levels) in init_with_program'
        from /usr/local/bundle/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `block in execute'
        from /usr/local/bundle/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `each'
        from /usr/local/bundle/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `execute'
        from /usr/local/bundle/gems/mercenary-0.4.0/lib/mercenary/program.rb:44:in `go'
        from /usr/local/bundle/gems/mercenary-0.4.0/lib/mercenary.rb:21:in `program'
        from /usr/local/bundle/gems/jekyll-4.2.1/exe/jekyll:15:in `<top (required)>'
        from /usr/local/bundle/bin/jekyll:25:in `load'
        from /usr/local/bundle/bin/jekyll:25:in `<top (required)>'
        from /usr/local/bundle/gems/bundler-2.2.29/lib/bundler/cli/exec.rb:58:in `load'
        from /usr/local/bundle/gems/bundler-2.2.29/lib/bundler/cli/exec.rb:58:in `kernel_load'
        from /usr/local/bundle/gems/bundler-2.2.29/lib/bundler/cli/exec.rb:23:in `run'
        from /usr/local/bundle/gems/bundler-2.2.29/lib/bundler/cli.rb:478:in `exec'
        from /usr/local/bundle/gems/bundler-2.2.29/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
        from /usr/local/bundle/gems/bundler-2.2.29/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
        from /usr/local/bundle/gems/bundler-2.2.29/lib/bundler/vendor/thor/lib/thor.rb:392:in `dispatch'
        from /usr/local/bundle/gems/bundler-2.2.29/lib/bundler/cli.rb:31:in `dispatch'
        from /usr/local/bundle/gems/bundler-2.2.29/lib/bundler/vendor/thor/lib/thor/base.rb:485:in `start'
        from /usr/local/bundle/gems/bundler-2.2.29/lib/bundler/cli.rb:25:in `start'
        from /usr/local/bundle/gems/bundler-2.2.29/exe/bundle:49:in `block in <top (required)>'
        from /usr/local/bundle/gems/bundler-2.2.29/lib/bundler/friendly_errors.rb:128:in `with_friendly_errors'
        from /usr/local/bundle/gems/bundler-2.2.29/exe/bundle:37:in `<top (required)>'
        from /usr/local/bundle/bin/bundle:25:in `load'
        from /usr/local/bundle/bin/bundle:25:in `<main>'

Which I recognized from before when I ignored the ruby==2.7.7 requirement during manual install.

Docker seems to include Ruby 3.2.4

docker build -t memfault/interrupt .
[+] Building 0.5s (15/15) FINISHED                                         docker:desktop-linux
 => [internal] load build definition from Dockerfile                                       0.0s
 => => transferring dockerfile: 628B                                                       0.0s
 => [internal] load metadata for docker.io/library/ruby:3.2.4-slim-bookworm                0.4s
 => [internal] load .dockerignore                                                          0.0s
 => => transferring context: 69B                                                           0.0s
 => [ 1/10] FROM docker.io/library/ruby:3.2.4-slim-bookworm@sha256:3e345863daec6349230144  0.0s
 => [internal] load build context                                                          0.0s
 => => transferring context: 128B                                                          0.0s
 => CACHED [ 2/10] RUN apt-get update && apt-get install -y --no-install-recommends     b  0.0s
 => CACHED [ 3/10] WORKDIR /memfault/interrupt                                             0.0s
 => CACHED [ 4/10] COPY Gemfile .                                                          0.0s
 => CACHED [ 5/10] COPY Gemfile.lock .                                                     0.0s
 => CACHED [ 6/10] RUN bundle config force_ruby_platform true                              0.0s
 => CACHED [ 7/10] RUN bundle install                                                      0.0s
 => CACHED [ 8/10] COPY requirements.txt .                                                 0.0s
 => CACHED [ 9/10] RUN python3 -m venv /venv && . /venv/bin/activate &&     python3 -m pi  0.0s
 => CACHED [10/10] COPY entrypoint.sh ./entrypoint.sh                                      0.0s
 => exporting to image                                                                     0.0s
 => => exporting layers                                                                    0.0s
 => => writing image sha256:925bd677ba7d920a641edfc36bafbd2fb2546926fe298bbbca3ac84d88139  0.0s
 => => naming to docker.io/memfault/interrupt                                              0.0s

View build details: docker-desktop://dashboard/build/desktop-linux/desktop-linux/oqxko25uiuhznxoem93a5ibv7

[JPHutchins]

This is fixed by updating the Dockerfile:

FROM ruby:2.7.7-slim