employeesdb is a toolchain for querying the employees database provided by https://github.com/datacharmer/test_db.
To work on this you can use docker-compose command:
docker-compose run app bash
Once in the shell, you can run:
bundle
...
edit some code
...
./exe/employeesdb salaries department 1999
While in the shell run:
rake spec
This uses a multi-stage Docker build to demonstrate how you might run this toolchain as a typical user would.
docker-compose run employeesdb salaries department 1999