Added build'n'deploy action

Author: jagot

.github/workflows/deploy.yml

@@ -0,0 +1,16 @@
+# On every push this script is executed
+on: push
+name: Build and deploy GH Pages
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/master'
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - name: build_and_deploy
+        uses: shalzz/zola-deploy-action@v0.16.1
+        env:
+          # Target branch
+          PAGES_BRANCH: gh-pages
+          TOKEN: ${{ secrets.GH_PAT }}