added -x to the shell

.forgejo/steps/push/action.yml

@@ -38,11 +38,12 @@ runs:
       env:
         REGISTRY_AUTH_FILE: ${{env.RUNNER_TEMP}}/auth.json
     - name: skopeo copy
-      shell: sh
+      shell: bash
       env:
         REGISTRY_AUTH_FILE: ${{env.RUNNER_TEMP}}/auth.json
         REGISTRY: ${{ inputs.registry }}
       run: |
+        set -x
         server=${REGISTRY//https:/docker:}
         if [[ "$server" != docker://* ]] ; then
             server="docker://$server"