#23 - added github actions for magic mirror test execution

.github/workflows/automated-tests.yaml

@@ -0,0 +1,38 @@
+name: "Run MagicMirror Automated Tests"
+
+on:
+    push:
+        branches: [master]
+    pull_request:
+        branches: [master]
+
+permissions:
+    contents: read
+
+jobs:
+    test:
+        runs-on: ubuntu-latest
+        timeout-minutes: 30
+        strategy:
+            matrix:
+                node-version: [14.x, 16.x, 18.x]
+        steps:
+            - name: Checkout code
+              uses: actions/checkout@v3
+              with:
+                  repository: MichMich/MagicMirror
+            - name: Use Node.js ${{ matrix.node-version }}
+              uses: actions/setup-node@v3
+              with:
+                  node-version: ${{ matrix.node-version }}
+                  cache: "npm"
+            - name: Install dependencies and run tests
+              run: |
+                  Xvfb :99 -screen 0 1024x768x16 &
+                  export DISPLAY=:99
+                  npm run install-mm:dev
+                  touch css/custom.css
+                  npm run test:prettier
+                  npm run test:js
+                  npm run test:css
+                  npm run test