👷 (doxygen): Upload Doxygen doc as artifact then publish it on GitHub…

… Pages

.github/workflows/build.yml

@@ -12,3 +12,26 @@ jobs:
     - uses: cachix/install-nix-action@v27
     - run: nix build
     - run: nix flake check
+
+    - name: Setup Pages
+      id: pages
+      uses: actions/configure-pages@v3
+
+    - name: Upload artifact
+      if: github.event_name == 'push'
+      uses: actions/upload-pages-artifact@v2
+      with:
+        path: result/share/doc/html/
+
+
+  documentation:
+    if: startsWith(github.ref, 'refs/tags/')
+    environment:
+      name: github-pages
+      url: ${{steps.deployment.outputs.page_url}}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+    - name: Publish Doxygen documentation on GitHub Pages
+      id: deployment
+      uses: actions/deploy-pages@v2