# Functions
GRPCGatewayServer returns a server for given services over HTTP / JSON and gRPC.
ListenForCtrlC gracefully stops all the servers on an interrupt signal.
ListenTLS binds to listenAddr and returns a gRPC connection to it.
MetricsServer returns server with monitoring APIs.
RootHeaalthHandler handles liveness checks at "/".
# Type aliases
RegisterServiceFromConn registers services with a grpc server's ServeMux.