Add a license

[Michael Inglis]

Hey @mercuryseries,

Thanks for setting up this boilerplate project for Django and Vue!

Could you please add a license? MIT license is good if you're not sure. I have a fork of this project so a license would be good, thanks.

Merci pour tout!

[Honoré Hounwanou]

Hey @MichaelNZ85
Just added a LICENSE.md file. MIT was used as suggested.
Have a nice day :).