It turns out that some kind hearted people already set up wildcard domains for you already. You can use any domain below and/or any subdomain of these and they currently resolve to 127.0.0.1 but could switch at any time to resolve somewhere else. Here's the list of ones I know about. Let me know if there are more!
localhost
- It will always works. Do you know why? I hope so.[*.]fbi.com
- 👏 👏 👏 👏 👏[*.]localtest.me
[*.]127-0-0-1.org.uk
[*.]vcap.me
[*.]yoogle.com