Beeprint Web interface with Marlin

I need to recompile web interface to make it working properly with Marlin because in the current status some things are broken due to unsupported gcode. The command fix that I'm considering to do is the following

/*
tool 'T0' 'T1' ''
*/
export const preHeatTool = (tool, temperature) => {
  if (tool === 'Bed') {
    return 'M140 S' + temperature + '\r\n';
  } else {
    return 'M104 S' + temperature + ' ' + tool + '\r\n';
  }
};

export const multipleStatRequest = () => {
  return 'M105\r\n' + // Report temperatures
    'M31\r\n' + // Report print time
    'M27\r\n' + // Report SD card print status (percentage)
    '\r\n';
};

export const requestFileList = (path = '') => {
  return 'M20 ' + path + '\r\n';
};

export const selectAndPrint = (file) => {
  return 'M23 ' + file + '\r\n' +
    'M24\r\n' +
    '\r\n';
};
export const printSelectFile = (file) => {
  return 'M23 ' + file + '\r\n';
};
export const printResumeStart = () => {
  return 'M24\r\n';
};
export const printPause = () => {
  return 'M25\r\n';
};
export const printStop = (file) => {
  return 'M524\r\n';
};
export const deleteFile = (file) => {
  return 'M30 ' + file + '\r\n';
};

// From 0 to 255
export const setFanSpeed = (speed) => {
  return 'M106 S' + speed + '\r\n';
};

export const cooldown = () => {
  return 'M104 S0\r\n' +
    'M140 S0\r\n';
};
export const unlock = () => {
  return 'M84\r\n';
};

export const moveAxes = (axis, step) => {
  let xA = '0.0';
  let yA = '0.0';
  let zA = '0.0';

  if (axis.toUpperCase() === 'X') {
    xA = step + '.0';
  } else if (axis.toUpperCase() === 'Y') {
    yA = step + '.0';
  } else if (axis.toUpperCase() === 'Z') {
    zA = step + '.0';
  }
  return 'G91\r\n' +
    'G0 X' + xA + ' Y' + yA + '.0 Z' + zA + '.0 F3000\r\n' +
    'G90\r\n';
};

export const extrudeFilament = (extruder, step) => {
  return 'T' + extruder + '\r\n' +
    'G91\r\n' +
    'G1 E' + step + ' F1000\r\n' +
    'G90\r\n';
};

export const homingXY = () => {
  return 'G28 X Y\r\n';
};
export const homingZ = () => {
  return 'G28 Z\r\n';
};
export const homingAll = () => {
  return 'G28 \r\n';
};
export const resetPrinter = () => {
  return 'M107\r\n' +
    'G1 Z10\r\n' +
    'M104 S0\r\n' +
    'M140 S0\r\n' +
    'M84\r\n';
};

export const coolDown = () => {
  return 'M104 S0\r\n' +
    'M140 S0\r\n' +
    'M106 S255\r\n';
};
export const unlockMotors = () => {
  return 'M84\r\n';
};

I don't know if may be needed some fix also to the code that parse the response of these commands. I would like some more details on the step to follow to compile the web interface to MksWifi_WebView.bin of the firmware as the current guide explain only the build process of the mkswifi.bin. In the repo readme there is written to run npm run build but this alone cannot work. It is also missing the description of the needed dependencies. I want to be able to generate a MksWifi_WebView.bin to place in sd to update the webinterface. Thanks for the support.