Fix: CI to use short commits

.github/workflows/ci.yml

@@ -120,6 +120,10 @@ jobs:
             type=semver,pattern=v{{major}},enable=${{ startsWith(steps.semvercheck.outputs.match, 'true_nonzero') }}
             type=raw,value=latest,enable=${{ !startsWith(steps.semvercheck.outputs.match, 'true') }}
 
+      - name: Short commit
+        id: shortcommit
+        run: echo "::set-output name=value::$(git rev-parse --short HEAD)"
+
       - name: Build and push final image
         uses: docker/build-push-action@v2.7.0
         with:
@@ -127,7 +131,7 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           build-args: |
             CREATED=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.created'] }}
-            COMMIT=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.revision'] }}
+            COMMIT=${{ steps.shortcommit.outputs.value }}
             VERSION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] }}
           tags: ${{ steps.meta.outputs.tags }}
           push: true