chore: set concurrency in workflow (#174)

.github/workflows/docker.rust.yml

@@ -17,6 +17,12 @@ on:
       - 'Cargo.lock'
       - 'crates/**'
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.ref_name }} 
+  
+  # If this is enabled it will cancel current running and start latest
+  cancel-in-progress: true
+
 jobs:
   tests:
     runs-on: ubuntu-latest