added

docs/.github/workflow/jekyll-build.yml

@@ -0,0 +1,21 @@
+name: Build Jekyll site
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '2.7'
+      - name: Install dependencies
+        run: bundle install
+      - name: Build Jekyll site
+        run: bundle exec jekyll build --source ./public --destination ./public/_site