Build/tool image with Go 1.15, librkafaka and build tools (git, gcc, make...) installed and ready to run.
Useful to run tests in CI and as base image for multi-stage builds.
There are two images available, based on Alpine (default) and Debian stretch.
If you plan to run tests with ginkgo and race detection enabled there's an issue with Alpine.
The Debian stretch must be used for this use case.