Add doc comments

Author: sd109

.github/workflows/helm-build-push.yml

@@ -19,10 +19,17 @@ jobs:
         with:
           fetch-depth: 0
 
+      # We mark any builds on main branch as latest GH release
+      # so make sure we don't accidentally use a pre-release tag.
       - name: Fail on semver pre-release chart version
         run: yq .version deployment/helm/Chart.yaml | grep -v '[a-zA-Z-]'
         if: ${{ github.ref_name == 'main'}}
 
+      # To reduce resource usage images are built only on tag.
+      # To build a new set of images after committing and pushing
+      # new changes to GitHub, use:
+      # git tag <tag-name>
+      # git push --tags
       - name: Fail if image tags don't exist
         run: >-
          curl -H "Authorization: Bearer $(echo ${{ secrets.GITHUB_TOKEN }} | base64)"