Hi GentleSwallow91

I am very much concerned with docker container spin up time.

To accelerate spin up time (mostly pip install) use the venv cahing (basically it will store a cache of the entire installed venv so it oes not need to reinstall it)
Unmark this line:
https://github.com/allegroai/clearml-agent/blob/178af0dee84e22becb9eec8f81f343b9f2022630/docs/clearml.conf#L116

The problem above could be that I used a non-root user to train a model and all packages are installed for non-root user but clearML agent runs container as a root user.

You can specify a user access folder instead of the "/root/" home folder here:
https://github.com/allegroai/clearml-agent/blob/178af0dee84e22becb9eec8f81f343b9f2022630/docs/clearml.conf#L241