Added docs workflow

.github/workflows/sphinx_docs_to_gh_pages.yaml

@@ -0,0 +1,32 @@
+name: Docs
+
+on:
+  push:
+    branches:
+      - main
+      - docs
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v3
+      - name: Set up Python
+        uses: actions/setup-python@v3
+        with:
+          python-version: "3.10"
+      - name: Install dependencies
+        run: |
+          sudo apt install pandoc libudunits2-dev
+          python -m pip install --upgrade pip
+          pip install ".[docs]"
+      - name: Build the docs
+        run: |
+          cd docs
+          make html
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./docs/build/html