[FEATURE] Make CORS domains configurable

[arddluma]

Is your feature request related to a problem? Please describe.
/

Describe the solution you'd like
Currently by default CORS is * that allows all domains

skandha/packages/types/src/options/api.ts

Line 11 in 9aa0095

cors: "*",

Add the ability to make this configurable by parameter.

Describe alternatives you've considered
/

Additional context
https://github.com/fastify/fastify-cors