Generate address locally by using subkey

[mrq1911]

How to use subkey to create HydraDX (ss58) address?

https://github.com/paritytech/substrate/tree/master/bin/utils/subkey

HydraDX (ss58) specific instruction to generate address in terminal

[cl0w5]

Good suggestion, I will pick this up once we introduce new docs structure (#34) and a Build chapter in the menu - i guess it would be a fit