Ask the User for a Prefix#13

**What** We need to prefix the docker containers with something, so as part of the user setup process, ask the user for a prefix. The prefix must be lowercase and a single word. The method exists in the `Project` class but not the logic **How** Use the response class to ask for a prefix. Look at how other methods implement it **Where** **Why** We need to prefix containers as well as the network **End Result** Prefix is saved as a property inside the project class and this is added to every required bit in the end configuration (former is most likely done) **Checklist** - [ ] Develop existing method **Resources**