Hey, thanks for the PR. Can you explain what the current problem is and how this solves it? Thank you

I thought this is a well known issue, e.g. see https://www.docker.com/blog/docker-best-practices-choosing-between-run-cmd-and-entrypoint/ "What is PID 1 and why does it matter?"

Also this is a problem on it's own:

Previously the arguments were silently dropped

Failed to execute goal org.antora:antora-maven-plugin:1.0.0-alpha.5:antora (default) on project spring-cloud-contract-docs: Antora failed to generate site successfully: Unable to execute com.github.eirslett:frontend-maven-plugin:1.15.0:npx (inspect prior log messages to find cause): Failed to run task: 'npx --offline antora --to-dir target/antora/site --stacktrace --fetch antora-playbook.yml' failed. org.apache.commons.exec.ExecuteException: Process exited with an error: 1 (Exit value: 1) -> [Help 1]

I don't think this PR broke that

I am no expert with Docker - I didn't know about that problem, thanks for pointing it out!

Yeah, don't worry about the issue with antora. Can you check the DCO check please?

Yeah, don't worry about the issue with antora. Can you check the DCO check please?

No idea what happened there, as AFAIK I made both changes via Github Web UI.

I've rebased the commits, hopefully this resolves the issue

Yeah, the antora build error is not related to your changes