The tool chain consists of binutils for the target m68k-amiga-elf, and clang from the not yet merged LLVM M680x0 fork.
The toolchain is installed under the /opt/amiga prefix, which is also the home directory of the amiga user that is the default user.
% docker run -it --rm -v `pwd`:/opt/amiga/mnt \
docker.pkg.github.com/notcalle/amiga-m68k-cross/toolchain