init mkdocs via github actions

.github/workflows/gh-pages.yml

@@ -0,0 +1,43 @@
+name: build and deploy mkdocs to github pages
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: "recursive" 
+          fetch-depth: 0    # Fetch all history for .GitInfo and .Lastmod
+
+      - name: Setup Python
+        uses: actions/setup-python@v1
+        with:
+          python-version: '3.7'
+          architecture: 'x64'
+
+    #  - name: Cache dependencies
+    #    uses: actions/cache@v1
+    #    with:
+    #      path: ~/.cache/pip
+    #      key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+    #      restore-keys: |
+    #        ${{ runner.os }}-pip-
+
+      - name: Install dependencies
+        run: |
+          python3 -m pip install --upgrade pip
+          python3 -m pip install mkdocs
+
+      - name: Build site
+        run: mkdocs build
+
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./site