activate GitHub workflow

Author: justb4

.github/workflows/publish.yml

@@ -0,0 +1,30 @@
+name: Deploy website ⚙️
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - '.github/workflows/**'
+      - 'docs/**'
+
+defaults:
+  run:
+    working-directory: docs
+
+jobs:
+  build:
+    name: Build and Deploy Website
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: '3.x'
+      - name: Install requirements 📦
+        run: |
+          sudo apt-get install -y python3-lxml
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+      - name: Deploy 📦
+        run: mkdocs gh-deploy --strict --force --message 'update website via GitHub Actions'