@droneblocks/node-red-dexi/src/ros2-websocket-server.js

You want to make sure you don't lose any of your flow development. Make sure to map the host "flows" directory to the container directory as shown below. This will store the flow on your host machine if/when the container is destroyed.

module.exports = function (RED){
    var ROSLIB = require('roslib');

    let dexiTopics = []
  
    function ROS2WebsocketServerNode(config) {
      RED.nodes.createNode(this, config);
      var node = this;

      node.closing = false;
      node.on("close", function() {
        node.closing = true;
        if (node.tout) { clearTimeout(node.tout); }
        if (node.ros){
          node.ros.close();
        }
      });
  
      var trials = 0;
  
      function startconn() {    // Connect to remote endpoint
        var ros = new ROSLIB.Ros({
          url : config.url
        });
        node.ros = ros; // keep for closing
        handleConnection(ros);
      }
  
      function handleConnection(ros) {
        ros.on('connection', function() {
          node.emit('ros connected');
          node.log('connected');

          // Get list of topics to send to the editor for ros2 pub/sub nodes
          node.ros.getTopics((topicsResponse) => {
            dexiTopics = topicsResponse
          })

        });
  
        ros.on('error', function(error) {
          trials++;
          node.emit('ros error');
          node.log('Error connecting : ', error);

          //if(trials == 5) node.closing = true
        });
  
        ros.on('close', function() {
            node.emit('ros closed');
            node.log('Connection closed');
          if (!node.closing) {
            node.log('reconnecting');
            node.tout = setTimeout(function(){ startconn(); }, 1000);
          }
        });
      }
  
      startconn();
      node.closing = false;
    }

    // Expose "API" to the editor for displaying topics
    RED.httpAdmin.get('/dexi/topics', (req, res) => {
      res.json(dexiTopics)
    })
  
    RED.nodes.registerType("ros2-websocket-server", ROS2WebsocketServerNode);
  };