🔧 add documentation workflow

.github/workflows/documentation.yml

@@ -0,0 +1,32 @@
+# This workflow will install Python dependencies, and generate documentation.
+
+name: ccdutils documentation
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  documentation:
+    name: Generate documentation
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          persist-credentials: false
+      - name: Set up python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.10"
+      - run: |
+          pip install -r dev-requirements.txt
+      - run: |
+          cd doc
+          make html
+      - name: Deploy pages
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./doc/_build/html