couchDB sync gateway in local databases

Ionic Framework ionic-v3
1

Hi,
I have a problem with data change management in chouchDB local storage:
https://forum.ionicframework.com/t/use-couchdb-joins-to-manage-foreign-documents/81280,

Can I use syn gateway with local databases?

Thank you

2

And you are posting again, why?

3

I would know if it’s the best solution, and how can I configure my sync_gateway to have
a synchronisation between local customer and local address.customer ?
thank you!