questions about Traccar server

hi
can the open source version be used in production?
can she manage a fleet of 200 or more vehicles?
does it manage customer subscriptions?

Yes, of course it can be used in production. It can handle much more than 200 devices. There is user management, but there's no billing, if that's what you are talking about.

yes I'm talking about the ability to manage customer subscriptions

I would like to configure it to put it into production. how to do ?

All information is available on this website. Read documentation.

please,show me the link that could help me in this direction