Create docker image for TRSS for new users

[llxia]

For new users, it will much easier if we have a TRSS docker image for them to try. Sample data should be inserted into database, so users can see the graphs or pipelines.

This docker image can also be used for setup PR build https://github.com/AdoptOpenJDK/openjdk-test-tools/issues/374

[smlambert]

FYI @d3r3kk @milderhc

[llxia]

Three possible use cases:

• production server
• PR builds
• new users

We should also consider a backup story if we use a docker container for DB.

[karianna]

@milderhc is working on this

[d3r3kk]

@milderhc to update as he progresses

[llxia]

Thanks @milderhc for PR #389 . It provides us a way to break up TRSS into 3 containers. @OscarQQ will look into have TRSS in one docker image. This will help onboard new people.