Handle connects to the gRPC Fleet server, managing the proxied request using the provided HTTP handler.

HandleWithCtx is similar to Handle but supports passing a context.

WithPathToCACertificate sets the path to the CA's TLS certficiate file.

WithPreferredSubdomain requests the server to register the client on the given subdomain.

WithRPCAddress sets the address of the gRPC server.

WithTLS sets the client to use TLS for connecting to the gRPC server.