Convert to running vnu checker locally

Author: phpfui

.github/workflows/tests.yml

@@ -10,7 +10,7 @@ jobs:
       matrix:
         php: [8.1, 8.0, 7.4]
         dependency-version: [prefer-stable]
-        os: [ubuntu-latest, windows-latest]
+        os: [ubuntu-latest]
 
     name: ${{ matrix.os }} - PHP${{ matrix.php }} - ${{ matrix.dependency-version }}
 
@@ -31,9 +31,23 @@ jobs:
           extensions: dom, curl, libxml, mbstring, zip, intl
           coverage: none
 
+      - name: Setup Java
+        uses: actions/setup-java@v2
+        with:
+          distribution: 'temurin'
+          java-version: '11'
+
+      - name: Download vnu checker
+        run: wget https://github.com/validator/validator/releases/download/20.6.30/vnu.jar_20.6.30.zip
+
+      - name: Unzip jar file
+        run: unzip vnu.jar_20.6.30.zip dist/vnu.jar -D .
+
+      - name: Run Nu Html Checker (v.Nu)
+        run: java -cp -jar ./vnu.jar -Xss1024k -Dnu.validator.servlet.bind-address=127.0.0.1 nu.validator.servlet.Main 8888
+
       - name: Install dependencies
-        run: |
-          composer update --${{ matrix.dependency-version }} --prefer-dist --no-interaction
+        run: composer update --${{ matrix.dependency-version }} --prefer-dist --no-interaction
 
       - name: Execute tests
         run: vendor/bin/phpunit