add CI for docs

.github/workflows/docs.yml

+name: Pages
+on:
+  push:
+    branches:
+    - master
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/setup-python@v2
+    - uses: actions/checkout@master
+      with:
+        fetch-depth: 0 # otherwise, you will failed to push refs to dest repo
+    - name: Build and Commit
+      uses: sphinx-notes/pages@v2
+      with:
+        requirements_path: ./docs/requirements.txt
+    - name: Push changes
+      uses: ad-m/github-push-action@master
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        branch: gh-pages
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docs/conf.py

@@ -41,7 +41,7 @@ templates_path = []
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This pattern also affects html_static_path and html_extra_path.
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store', 'requirements.txt']
 
 
 # -- Options for HTML output -------------------------------------------------

docs/requirements.txt

+sphinx-rtd-theme == 1.1
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