Add publish GitHub workflow (#26)

* Add publish GitHub workflow

* Limit to publish

Author: adam-fowler

.github/workflows/publish.yml

@@ -0,0 +1,51 @@
+name: "Publish Dev Container Templates & Generate Documentation"
+on:
+  workflow_dispatch:
+
+jobs:
+  deploy:
+    if: ${{ github.ref == 'refs/heads/main' }}
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: write
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: "Publish Templates"
+        uses: devcontainers/action@v1
+        with:
+          publish-templates: "true"
+          base-path-to-templates: "./src"
+          #generate-docs: "true"
+
+        #env:
+        #  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+#      - name: Create PR for Documentation
+#        id: push_image_info
+#        env:
+#          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+#        run: |
+#          set -e
+#          echo "Start."
+#
+          # Configure git and Push updates
+#          git config --global user.email github-actions[bot]@users.noreply.github.com
+#          git config --global user.name github-actions[bot]
+#          git config pull.rebase false
+
+#          branch=automated-documentation-update-$GITHUB_RUN_ID
+#          git checkout -b $branch
+#          message='Automated documentation update'
+
+          # Add / update and commit
+#          git add */**/README.md
+#          git commit -m 'Automated documentation update [skip ci]' || export NO_UPDATES=true
+
+          # Push
+#          if [ "$NO_UPDATES" != "true" ] ; then
+#              git push origin "$branch"
+#              gh pr create --title "$message" --body "$message"
+#          fi