Update workflow

.github/workflows/debian.yml

@@ -0,0 +1,32 @@
+# This is a basic workflow to help you get started with Actions
+
+name: CodeStyle
+
+# Controls when the action will run. Triggers the workflow on push or pull request
+# events but only for the master branch
+on: [push]
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  php-cs-fixer:
+    name: PHP-CS-Fixer
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: PHP-CS-Fixer
+        uses: docker://oskarstark/php-cs-fixer-ga
+        with:
+          args: --config="./tests/php-cs-fixer/php_cs.config"
+
+      - name: Commit changes
+        run: |
+          git add --all
+          git commit -m "Fix codestyle."
+
+      - name: Push changes # push the modif to repo
+        uses: ad-m/github-push-action@master
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          force: true
+          
+