Error: Invalid or corrupt jarfile /app/app.jar

Following the steps to run sample-docker:
https://github.com/citrusframework/citrus-samples/tree/master/sample-docker/java-dsl

I was ok up until mvn docker:start

This is what I'm seeing:
[INFO] --- docker-maven-plugin:0.26.0:start (default-cli) @ citrus-java-sample-docker ---
[INFO] DOCKER> [citrusframework/todo-demo-app:1.1.0] "todo-app": Start container 5f93a0f729f4
[INFO] DOCKER> [citrusframework/todo-demo-app:1.1.0] "todo-app": Waiting on url http://localhost:8080/todolist with method GET for status 200.
**11:17:18.304 todo-app> Error: Invalid or corrupt jarfile /app/app.jar
Error: Invalid or corrupt jarfile /app/app.jar
5f93a0Error: Invalid or corrupt jarfile /app/app.jar**
[ERROR] DOCKER> [citrusframework/todo-demo-app:1.1.0] "todo-app": Container stopped with exit code 1 unexpectedly after 801 ms while waiting on url http://localhost:8080/todolist
[ERROR] DOCKER> Error occurred during container startup, shutting down...