Update .github/workflows/action.yml

.github/workflows/action.yml

@@ -1,6 +1,8 @@
-name: 'Tag Build and Push Docker image'
-description: 'Tags verion in current repo, builds docker image and pushes it to registry'
-inputs:
+name: Docker Build
+
+on: 
+  workflow_call:
+    inputs:
       registry:  # id of input
         description: 'docker regisry host name'
         required: true
@@ -17,8 +19,10 @@ inputs:
         description: 'repo auth token'
         required: true
 
-runs:
-  using: "composite"
+
+jobs:
+  build:
+    runs-on: slim
     steps:
       - run: echo "::group::Checkout repository"
         if: ${{ always() }}