[9.x] Run tests for skeleton (#5873)

* Run tests for skeleton

* wip

* wip

.github/workflows/tests.yml

@@ -0,0 +1,30 @@
+name: Tests
+
+on: [push, pull_request]
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.1
+          extensions: dom, curl, libxml, mbstring, zip, pcntl, pdo, sqlite, pdo_sqlite
+          coverage: none
+
+      - name: Install Composer dependencies
+        run: composer install --prefer-dist --no-interaction
+
+      - name: Copy environment file
+        run: cp .env.example .env
+
+      - name: Generate app key
+        run: php artisan key:generate
+
+      - name: Execute tests
+        run: vendor/bin/phpunit