Remove separate linting job and add it to build job.

Author: cblauvelt

.github/workflows/docker-publish.yml

@@ -20,7 +20,7 @@ env:
   IMAGE_NAME: cblauvelt/vscode-cpp
 
 jobs:
-  build:
+  build-and-publish:
     runs-on: ubuntu-latest
     permissions:
       contents: read
@@ -30,6 +30,11 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
 
+      - name: Check for linting errors
+      - uses: hadolint/[email protected]
+        with:
+          dockerfile: Dockerfile
+
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action
       - name: Log into registry ${{ env.REGISTRY }}