🤖 Add concurrency to pipeline

run only on main and PRs

.github/workflows/image.yaml

@@ -2,8 +2,14 @@ name: Build image
 
 on: 
  push:
+   branches:
+     - main
  pull_request:
 
+concurrency:
+  group: ci-image-${{ github.head_ref || github.ref }}-${{ github.repository }}
+  cancel-in-progress: true
+
 jobs:
   build:
     runs-on: ubuntu-latest