Update main.yml

Author: alexandredevely

.github/workflows/main.yml

@@ -23,6 +23,10 @@ jobs:
         run: |
           echo "ref set to '${{ env.ref }}'"
           echo "image tag set to '${{ env.imagetag }}'"
+
+      - name: show Dockerfile
+        run: |
+          cat Dockerfile
     
       - name: Checkout repository
         uses: actions/checkout@v4