Create build_docs.yml

trying build docs in branch

.github/workflows/build_docs.yml

@@ -0,0 +1,38 @@
+name: build_docs
+
+on: [push, pull_request, workflow_dispatch]
+
+permissions:
+  contents: write
+
+jobs:
+  build_docs:
+    runs-on: ubuntu-latest
+    env:
+       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v3
+      - name: Install dependencies
+        run: |
+          pip install sphinx sphinx_rtd_theme myst_parser
+      - name: Sphinx build
+        run: |
+          cd docs
+          make clean
+          make html
+          cd _build
+          touch .nojekyll
+          git init
+          git add -A
+          git config --local user.email "[email protected]"
+          git config --local useer.name "GitHub Action"
+          git commit -m 'deploy'
+      - name: Deploy to GitHub Pages, force push to destination branch
+        uses: ad-m/[email protected]
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_branch: gh-pages
+          publish_dir: ./docs/_build/html
+          force: true
+          force_orphan: true