(docs): update github action for conda and folder docs/

.github/workflows/deploy-mkdocs.yml

@@ -11,21 +11,26 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - name: Set up Python
-        uses: actions/setup-python@v2
+      - name: Set up Conda
+        uses: conda-incubator/setup-miniconda@v2
         with:
-          python-version: '3.x'
+          auto-update-conda: true
+          python-version: 3.9
 
       - name: Install dependencies
+        shell: bash -l {0}
         run: |
-          python -m pip install --upgrade pip
-          pip install mkdocs mkdocs-material
+          cd docs/
+          conda install -c conda-forge --file requirements.txt
 
       - name: Build site
-        run: mkdocs build
+        shell: bash -l {0}
+        run: |
+          cd docs/
+          mkdocs build
 
       - name: Deploy to GitHub Pages
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ./site
+          publish_dir: ./docs/site