Add workflow for Github pages

Signed-off-by: Charlie Street <me@charliestreet.net>

.github/deploy.yml

@@ -0,0 +1,51 @@
+
+name: Deploy
+# Deploy sphinx documentation to GitHub Pages in docs branch
+
+on:
+    # Triggers the workflow on push or pull request events but only for the "main" branch
+    push:
+        branches: [ "main" ]
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+        steps:
+            # Checkout the repository
+            - name: Checkout repository
+              uses: actions/checkout@v2
+            # install the dependencies
+            - name: Install dependencies
+              run: pip install -r docs/requirements.txt
+            # build the documentation
+            - name: Build documentation
+              run: |
+                    cd docs
+                    make html
+            # upload the documentation to GitHub Pages
+            - name: Upload artifact
+              uses: actions/upload-pages-artifact@v3
+              with:
+                    path: docs/build/html
+    deploy:
+        # Add a dependency to the build job
+        needs: build
+
+        # Grant GITHUB_TOKEN the permissions required to make a Pages deployment
+        permissions:
+            pages: write      # to deploy to Pages
+            id-token: write   # to verify the deployment originates from an appropriate source
+
+        # Deploy to the github-pages environment
+        environment:
+            name: github-pages
+            url: ${{ steps.deployment.outputs.page_url }}
+
+        runs-on: ubuntu-latest
+
+        steps:
+            # deploy the documentation to GitHub Pages
+            - name: Deploy to github pages
+              id: deployment
+              uses: actions/deploy-pages@v4
+