code: function join (callback) {
    log('connected to sig-server')
    io.emit('ss-join', {
      peerId: config.peerId.toHex(),
      notify: true
    })
    io.on('we-update-finger', fingerTable.updateFinger(io))
    io.on('we-handshake', channel.accept(io))
  
    io.once('we-ready', callback)
  }
docs: join the peerTable of the sig-server