chore(backend gallery): add linter

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

Author: mudler

.github/workflows/yaml-check.yml

@@ -8,11 +8,19 @@ jobs:
     steps:
       - name: 'Checkout'
         uses: actions/checkout@master
-      - name: 'Yamllint'
+      - name: 'Yamllint model gallery'
         uses: karancode/yamllint-github-action@master
         with:
           yamllint_file_or_dir: 'gallery'
           yamllint_strict: false
           yamllint_comment: true
         env:
           GITHUB_ACCESS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: 'Yamllint Backend gallery'
+        uses: karancode/yamllint-github-action@master
+        with:
+          yamllint_file_or_dir: 'backend'
+          yamllint_strict: false
+          yamllint_comment: true
+        env:
+          GITHUB_ACCESS_TOKEN: ${{ secrets.GITHUB_TOKEN }}