Add Github Action workflow to make sure build is not broken after updates

Author: Marten Klitzke

.github/workflows/main.yml

@@ -0,0 +1,35 @@
+name: Main
+
+on:
+  push:
+    branches:
+      - "**"
+  workflow_dispatch:
+
+env:
+  RUBY_VERSION: 2.7.6
+  NODE_VERSION: 14.18.1
+  JEKYLL_ENV: development
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ env.RUBY_VERSION }}
+          bundler-cache: true
+      - name: Install Node.js ${{ env.NODE_VERSION }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: yarn
+      - uses: actions/cache@v2
+        with:
+          path: |
+            '**/node_modules'
+          key: ${{ runner.os }}-modules-${{ hashFiles('**/yarn.lock') }}
+      - run: yarn install
+      - name: Build
+        run: bundle exec jekyll serve

yarn.lock

@@ -317,9 +317,9 @@ caniuse-api@^3.0.0:
     lodash.uniq "^4.5.0"
 
 caniuse-lite@^1.0.0, caniuse-lite@^1.0.30001109, caniuse-lite@^1.0.30001317:
-  version "1.0.30001320"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001320.tgz#8397391bec389b8ccce328636499b7284ee13285"
-  integrity sha512-MWPzG54AGdo3nWx7zHZTefseM5Y1ccM7hlQKHRqJkPozUaw3hNbBTMmLn16GG2FUzjR13Cr3NPfhIieX5PzXDA==
+  version "1.0.30001397"
+  resolved "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001397.tgz"
+  integrity sha512-SW9N2TbCdLf0eiNDRrrQXx2sOkaakNZbCjgNpPyMJJbiOrU5QzMIrXOVMRM1myBXTD5iTkdrtU/EguCrBocHlA==
 
 chalk@^2.0.1, chalk@^2.1.0, chalk@^2.4.1, chalk@^2.4.2:
   version "2.4.2"