rspbberypi,debian,ubuntuなら https://nodered.jp/docs/getting-started/raspberrypi より

bash <(curl -sL https://raw.githubusercontent.com/node-red/linux-installers/master/deb/update-nodejs-and-nodered)

.node-red/setting.js

• project機能

// Customising the editor
editorTheme: {
    projects: {
        // To enable the Projects feature, set this value to true
        //enabled: false
        enabled: true
    }
}

image表示(jpegをBASE64にしたものを表示)

<img src="data:image/jpeg;base64,{{msg.payload}}" />

msg.payload = {
  "field1": "value1",
  "field2": "value2"
};
return msg;