When running the java standalone, use command like java -jar build/libs/AvatarCreator-0.1.0.jar --avatarNameUri=http://<avatar_name_service>:<port>/. This retrieves the name section of the final output from another microservice. Refer https://github.com/bbideep/go

When the env var 'avatarNameUri' is not provided, the remote service is not called and the result output is something like 'ZOMBIE_AVATAR_<randomnumber>'

Build the image: docker build -f Dockerfile -t avatar_name_creator:0.1 .
Run in a container like docker run -d -p 8080:8080 -e avatarNameUri=http://<avatar_name_service>:<port>/ avatar_name_creator:0.1.

You would see an output like 'ZOMBIE_AVATAR_<randomnumber>' if the env var avatarNameUri is not provided at run time.