Http4kWsHeartbeatHandler
Configure the server-initiated heartbeat. Send a PING when the server writer is idle. Close the connection if the server reader is idle (i.e. the client never responsed with a PONG)
Configure the server-initiated heartbeat. Send a PING when the server writer is idle. Close the connection if the server reader is idle (i.e. the client never responsed with a PONG)