NEW: Added GH action for publishing slidedeck

- use GH action to automatically publish slidedeck upon push to
  main branch

 On branch main
 Changes to be committed:
	new file:   .github/workflows/publish.yml

.github/workflows/publish.yml

@@ -0,0 +1,26 @@
+on:
+    workflow_dispatch:
+    push:
+      branches: main
+
+  name: Quarto Publish
+
+  jobs:
+    build-deploy:
+      runs-on: ubuntu-latest
+      permissions:
+        contents: write
+      steps:
+        - name: Check out repository
+          uses: actions/checkout@v3
+
+        - name: Set up Quarto
+          uses: quarto-dev/quarto-actions/setup@v2
+
+        - name: Render and Publish
+          uses: quarto-dev/quarto-actions/publish@v2
+          with:
+            target: gh-pages
+            path: acme-demo.qmd
+          env:
+            GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}