try to setup dev env

.dockerignore

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+vendor
+pkg
+Dockerfile
+.github

.github/PULL_REQUEST_TEMPLATE.md

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+Thank you for your contribution!
+
+## Checklist
+- [ ] Added tests
+- [ ] Updated README.md (if user facing behavior changed)

.github/workflows/actions.yml

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+name: CI
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby: ['2.7', '3.0', '3.1', '3.2']
+    name: ${{ matrix.ruby }} rake
+    steps:
+    - uses: actions/checkout@v2
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby }}
+        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - run: bundle exec rake

Dockerfile

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+FROM ruby:3.2
+
+# cache gems
+COPY lib lib
+COPY cld.gemspec Gemfile Gemfile.lock ./
+RUN bundle
+
+# copy rest
+COPY ext ext
+COPY spec spec
+COPY .rspec Rakefile ./
+
+# install cld
+RUN git clone https://github.com/mzsanford/cld.git
+RUN cd cld && libtoolize && ./configure && aclocal && automake --add-missing && make && make install
+# RUN cd cld && autoreconf -f -i -Wall,no-obsolete && ./configure && make && make install
+
+#RUN rake