@droneblocks/node-red-dexi/src/led.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) {
    function LedNode(config) {
        RED.nodes.createNode(this, config)
        var node = this
        node.on('input', function(msg) {
            // Use color from message payload if available, otherwise use config
            const color = (msg.payload && msg.payload.color) ? msg.payload.color : config.color

            msg.payload = {
                "serviceName": "/dexi/led_service/set_led_ring_color",
                "serviceType": "dexi_interfaces/srv/LEDRingColor",
                "serviceRequest": {
                    "color": color
                }
            }
            node.send(msg)
        })
    }
    RED.nodes.registerType("led", LedNode)
}