Adding built docker image to gchr

[ensaremirerol]

Hi,

Existing Docker file works on pretty much on any machine but I had problems building it on some machines.

My solution was building the image on another machine and transferring that image to target machine.

So It would be really nice to have pipeline that builds the image and pushes it gchr so it can be ready to use without any other extra steps.

I can take on that if you accept PRs