Thanks Tim! I just updated the article to reflect that.

Some feedback — the current UI is confusing about what is mandatory and what isn’t, and also the documentation at https://docs.aws.amazon.com/serverlessrepo/latest/devguide/serverless-app-publishing-applications.html says that an SPDX license is necessary, but that a source code link is not, which I took to imply that an SPDX license was always necessary. I did just try deploying without an SPDX and sure enough, it worked, but maybe some documentation clean-up would be useful here.