ntfy is not working with own root-ca

[svn2208]

Description

I tried to get ntfy working with my own ntfy server, which is using a self created root-ca. It is working fine with other services. I added the root-ca to the alpine trust store and checked with curl and it worked fine. But the ntfy go app is somehow not using the system trust store.

Is it possible to implement a option to add my own root-ca to the ntfy plugin or bring the plugin to use the system trust store?