create a new task from app.clearml by pulling a repo from github. do i need to make changes (add the clearml 2 line code) in the entrypoint file in the repo for the task to execute in clearml dashboard.

Can your re-explain/re-word this ? What exactly are you trying to do and what exactly did you do ??

i am trying to place the clearml-agent in a docker container and run it in docker mode.

If you are running the clearml-agent in docker, I don't think that is compatible with "docker mode". What do you mean by running in "docker mode" ? What command did you use to start the clearml-agent inside the container ?

From the log, I can see that if failed to install python package like dlib because it's missing CMake which is not avail in the native docker image nvidia/cuda:11.0.3-cudnn8-runtime-ubuntu20.04

You try to make your own docker image with CMake and even dlib inside manually
Then run clearml-agent inside your container, without docker mode.

ClearML staff may have better solution as I am not familiar with the docker mode

i ran this command to start clearml-agent in docker mode
clearml-agent daemon --queue default --docker

created a new task in clearml dashboard using the git details of the repository

What error do you have in the Console log tab, in the Web UI ?