[Docs] Jenkins Guide

[Kenith]

Add Jenkins Guide into docker/Jenkins

[garris]

Hi @Kenith, this looks good — but maybe this belongs in the examples directory — instead of under ./docker/?

[Kenith]

Hello @garris, we suggest to put it in ./docker/, since the jenkins guide is based on the docker image backstopjs/backstopjs:latest.

Also, I have added .dockerignore to make sure the Jenkins folder won't be added to docker image.

You are very welcome if you have any questions.

Thank you,
Ken

[garris]

I am not sure that users will think the same way. A Jenkins user may actually expect to see the Docker config inside a top-level Jenkins directory (e.g. ./jenkins/docker/ or even ./jenkins-docker/).

But maybe more important, this Jenkins/DooD approach is a (very useful but) very opinionated implementation -- which seems to be very good as an example but perhaps not ready for production use because of the security concerns (e.g. giving Jenkins sudo permissions and docker-outside-of-docker) -- whereas the existing Docker implementation is intended for general use and therefore given 1st class status inside the repo.

I think this implementation serves as an excellent example -- it could probably be a very useful blog post as well. I would gladly highlight this in the documentation -- I think it would be very very appreciated by Jenkins users.

[Kenith]

Hello @garris,

Really apologies for delay. These days are lots of drama things.

I have moved the jenkins guide to examples.
And I fully agree with your opinions about the security issue. In the coming days, I will seek help from our dev ops team for more professional jenkins settings.

Cheers,
Ken

[garris]

This looks great. Thank you!