Deploying custom REST endpoints in WS 11.3.1

Good afternoon,

We are seeking information on how to deploy custom REST endpoints in WS 11.3.1

In the developer's documentation, it is stated to use any REST client for deploying JARs.

We are using POSTMAN (a Google Chrome extension) to deploy them but are unable to do so.

What steps are required to deploy custom REST endpoints JARs, and what headers should be used inside the REST client?

Best regards,

Laurent