Migrate publication to Github Actions (#566)

* Create publish-docs.yml

* Trim minor Python version, not supported by Github

* Setup dependencies

* Don't cd into docs

* Add cname

* Don't run on pull requests, only on merges

* Delete .travis.yml

* Delete deploy_key.enc

---------

Co-authored-by: Isaac Vetter <[email protected]>
Co-authored-by: Josh Mandel <[email protected]>

Author: 3 people

.github/workflows/publish-docs.yml

@@ -0,0 +1,31 @@
+name: Publish docs
+
+on:
+  push:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-20.04
+
+    steps:
+    - uses: actions/checkout@v2
+    
+    - name: Set up Python 3.6
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.6
+        
+    - name: Setup dependencies
+      run: pip install -r requirements.txt
+        
+    - name: Generate docs
+      run: mkdocs build --verbose --clean --strict
+
+    - name: Deploy
+      uses: peaceiris/actions-gh-pages@v3
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        publish_dir: ./site
+        cname: cds-hooks.org