Hi there, there is a PR that address this regression.
https://github.com/bentoml/BentoML/pull/3501
This has to do with the containerize steps builds the bento from a temp directory. and since the dockerfile template is not included in the bento, the content inside Dockerfile template will be omitted. This is a regression I introduce in order to fix another containerize bug 😄
Hopefully we can get 1.0.14 out soon that will include this fix.