FYI Something seems to have changed with the Docker image of the 2.0b7 release (

prefecthq/prefect:2.0b7-python3.10

to be exact); I was getting error code 255 at the

apt-key add

step in my custom image. Adding `apt install gnupg`fixed the issue.

Thanks for raising. This looks like something we need to look into @Marvin open “Prefect image gives error code 255”