code: func (s *Server) StartNode(w http.ResponseWriter, req *http.Request) {
  	node := req.Context().Value("node").(*Node)
  
  	if err := s.network.Start(node.ID()); err != nil {
  		http.Error(w, err.Error(), http.StatusInternalServerError)
  		return
  	}
  
  	s.JSON(w, http.StatusOK, node.NodeInfo())
  }
docs: // StartNode starts a node