add reference example of using multizones

[amclin]

Multizones are an important feature from NextJS for allowing multiple apps to be hosted on the same domain at different paths. Perhaps you want to isolate from a legacy experience, or perhaps deploy multiple NextJS apps at different URLs on the same domain.

https://nextjs.org/docs#multi-zones

[vinodloha]

Can you assign this to me, i can't assign it myself may be requires an invite.