install prerequisites

Author: pgwillia

.github/workflows/push.yml

@@ -11,6 +11,9 @@ jobs:
       - name: Build the docker-compose stack
         run: docker-compose -f docker-compose.lightweight.yml up -d
 
+      - name: install xmllint
+        run: sudo apt-get install libxml2-utils
+
       - name: Set up Ruby 2.6
         uses: ruby/setup-ruby@v1
         with:
@@ -29,7 +32,7 @@ jobs:
           bundle config path vendor/bundle
           bundle config set without 'production development'
           bundle install --jobs 4 --retry 3
-          
+
       - name: Lint with RuboCop
         run: bundle exec rubocop --parallel