npm install
npm run start
{
"type": "qrCode", //code type, defaults qrCode, support 'qrCode' 'barCode'
"icon": "./static/test.jpg", //qrCode centre icon
"fgColor": "black", //code color
"bgColor": "white", //code background color
"width": 250, //qrCode width / barCode line Width
"height": 250, //qrCode height / barCode line height
"data": "This is a dome!", //Scan code information
"fileName": "", //saved file name
"fileType": "png" //saved file type, defaults png, support 'png' 'jpeg' 'pdf' 'svg'
}