Where to find logs, while building gitpod with custom docker images?

  docker, gitpod, google-cloud-platform

I am trying to customize Gitpod-Workspace! In that I have tried to build and use docker image (which have google sdk and terraform) in gitpod. That docker image should be used as terminal in gitpod and it should be opened in startup! Image build is completing properly but issue is that, it didn’t launch and gitpod freezes! and sometimes it showed IDE error 127.
https://github.com/nikhil-devangles/gitpod_testing.git These configuration files I am using right now.
Is there any way to check logs and error. My initial guess is .gitpod.yml file have some issue.

Source: Docker Questions