Trac is stable software ready for you and your team to use to find and fix bugs:
Trac has excellent documentation, both for users and administrators. It's built with well-understood software – relational databases and Python, and it's got localization ("L10n") built in.
While Trac isn't necessarily
docker friendly, the deployment instructions are easy to follow, and result in a command that's fairly straight forward:
$ tracd --port 8000 /path/to/myproject
While there are some docker images in DockerHub, there's no official
trac docker image. The most recent one seems to be ~2 years old:
Dockerfile for that project might be the best way to get started with