git clone https://github.com/arduino/arduino-create-agent-js-client.git

handleUpload() {    const target = {      board: 'arduino:avr:nano',      port: 'COM7',      network: false    };    this.setState({ uploadingPort: target.port });    daemon.boardPortAfterUpload.subscribe(portStatus => {      if (portStatus.hasChanged) {        this.setState({ uploadingPort: portStatus.newPort });      }    });    // Upload a compiled sketch.    daemon.uploadSerial(target, 'serial_mirror', { bin: HEX });  }

npm run dev

C:\Users\USER\AppData\Roaming\ArduinoCreateAgent\config.ini

gc = std  # Type of garbage collection. std = Normal garbage collection allowing system to decide (this has been known to cause a stop the world in the middle of a CNC job which can cause lost responses from the CNC controller and thus stalled jobs. use max instead to solve.), off = let memory grow unbounded (you have to send in the gc command manually to garbage collect or you will run out of RAM eventually), max = Force garbage collection on each recv or send on a serial port (this minimizes stop the world events and thus lost serial responses, but increases CPU usage)hostname = unknown-hostname  # Override the hostname we get from the OSregex = usb|acm|com  # Regular expression to filter serial port listv = true  # show debug loggingappName = CreateAgent/StableupdateUrl = https://downloads.arduino.cc/origins = http://localhost:8000 #this is where I have setted#httpProxy = http://your.proxy:port # Proxy server for HTTP requestscrashreport = false # enable crashreport logging