Building a working Ruby environment on M2

I had some serious issues building a compatible Ruby env to build the docs on my M2 mac.

Here is the Gemfile.lock that I managed to use successfully in the end.

GEM
  remote: https://rubygems.org/
  specs:
    activesupport (6.0.3.2)
      concurrent-ruby (~> 1.0, >= 1.0.2)
      i18n (>= 0.7, < 2)
      minitest (~> 5.1)
      tzinfo (~> 1.1)
      zeitwerk (~> 2.2, >= 2.2.2)
    addressable (2.7.0)
      public_suffix (>= 2.0.2, < 5.0)
    coffee-script (2.4.1)
      coffee-script-source
      execjs
    coffee-script-source (1.11.1)
    colorator (1.1.0)
    commonmarker (0.17.13)
      ruby-enum (~> 0.5)
    concurrent-ruby (1.1.6)
    dnsruby (1.61.3)
      addressable (~> 2.5)
    em-websocket (0.5.1)
      eventmachine (>= 0.12.9)
      http_parser.rb (~> 0.6.0)
    ethon (0.12.0)
      ffi (>= 1.3.0)
    eventmachine (1.2.7)
    execjs (2.7.0)
    faraday (1.0.1)
      multipart-post (>= 1.2, < 3)
    ffi (1.13.1)
    forwardable-extended (2.6.0)
    gemoji (3.0.1)
    github-pages (206)
      github-pages-health-check (= 1.16.1)
      jekyll (= 3.8.7)
      jekyll-avatar (= 0.7.0)
      jekyll-coffeescript (= 1.1.1)
      jekyll-commonmark-ghpages (= 0.1.6)
      jekyll-default-layout (= 0.1.4)
      jekyll-feed (= 0.13.0)
      jekyll-gist (= 1.5.0)
      jekyll-github-metadata (= 2.13.0)
      jekyll-mentions (= 1.5.1)
      jekyll-optional-front-matter (= 0.3.2)
      jekyll-paginate (= 1.1.0)
      jekyll-readme-index (= 0.3.0)
      jekyll-redirect-from (= 0.15.0)
      jekyll-relative-links (= 0.6.1)
      jekyll-remote-theme (= 0.4.1)
      jekyll-sass-converter (= 1.5.2)