./launcher && ./launcher start app はビルドされたDockerイメージを削除しますか？

[featheredtoast (Jeff Wong)]

@corot2a

Or will it just remove and recreate the container while keeping the existing image intact?

To answer directly, yes, it’s this one - your built image is unaffected. The command is equivalent to a docker stop && docker rm, and it does not affect docker images at all.