How to set application icon in eletron-vue js

I am working with electron-vue js for building cross platform desktop app. I want to set custom icon when i make build file and want to add product name on app. But when i set custom icon, it work perfect in locally but when make it build then not work correctly. It give an error default Electron icon is used reason=application icon is not set.

Here is Background.js file

'use strict'

import { app, protocol, BrowserWindow } from 'electron'
import { createProtocol } from 'vue-cli-plugin-electron-builder/lib'
import installExtension, { VUEJS_DEVTOOLS } from 'electron-devtools-installer'
const isDevelopment = process.env.NODE_ENV !== 'production'


// Scheme must be registered before the app is ready
protocol.registerSchemesAsPrivileged([
    { scheme: 'app', privileges: { secure: true, standard: true } }
])

async function createWindow() {
    const path = require('path')
    const win = new BrowserWindow({
        webPreferences: {
            icon: path.join(__dirname, '../public/favicon.ico'),
            // Use pluginOptions.nodeIntegration, leave this alone
            // See nklayman.github.io/vue-cli-plugin-electron-builder/guide/security.html#node-integration for more info
            nodeIntegration: process.env.ELECTRON_NODE_INTEGRATION
        }
            
    })
    win.maximize();
    win.removeMenu();
    //win.setIcon(path.join(__dirname, '../public/favicon.ico'));
    if (process.env.WEBPACK_DEV_SERVER_URL) {
        // Load the url of the dev server if in development mode
        await win.loadURL(process.env.WEBPACK_DEV_SERVER_URL)
        if (!process.env.IS_TEST) win.webContents.openDevTools()
    } else {
        createProtocol('app')
        // Load the index.html when not in development
        win.loadURL('app://./index.html')
       
    }
    
}

// Quit when all windows are closed.
app.on('window-all-closed', () => {
    // On macOS it is common for applications and their menu bar
    // to stay active until the user quits explicitly with Cmd + Q
    if (process.platform !== 'darwin') {
        app.quit()
    }
})

app.on('activate', () => {
    // On macOS it's common to re-create a window in the app when the
    // dock icon is clicked and there are no other windows open.
    if (BrowserWindow.getAllWindows().length === 0) createWindow()
})

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', async () => {
    if (isDevelopment && !process.env.IS_TEST) {
        // Install Vue Devtools
        try {
            await installExtension(VUEJS_DEVTOOLS)
        } catch (e) {
            console.error('Vue Devtools failed to install:', e.toString())
        }
    }
    createWindow()
})

// Exit cleanly on request from parent process in development mode.
if (isDevelopment) {
    if (process.platform === 'win32') {
        process.on('message', (data) => {
            if (data === 'graceful-exit') {
                app.quit()
            }
        })
    } else {
        process.on('SIGTERM', () => {
            app.quit()
        })
    }
}

And Package.Json is

{
  "name": "pmptestengine",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "serve": "vue-cli-service serve",
    "build": "vue-cli-service build",
    "lint": "vue-cli-service lint",
    "electron:build": "vue-cli-service electron:build",
    "electron:serve": "vue-cli-service electron:serve",
    "postinstall": "electron-builder install-app-deps",
    "postuninstall": "electron-builder install-app-deps"
  },
  "main": "background.js",
"devDependencies": {
    "@vue/cli-plugin-babel": "~4.5.0",
    "@vue/cli-plugin-eslint": "~4.5.0",
    "@vue/cli-plugin-router": "~4.5.0",
    "@vue/cli-plugin-vuex": "~4.5.0",
    "@vue/cli-service": "~4.5.0",
    "babel-eslint": "^10.1.0",
    "electron": "^11.0.0",
    "electron-devtools-installer": "^3.1.0",
    "eslint": "^6.7.2",
    "eslint-plugin-vue": "^6.2.2",
    "vue-cli-plugin-electron-builder": "~2.0.0-rc.6",
    "vue-template-compiler": "^2.6.11"
  }
}

When we work in electron vue js. we add new file vue.config.js and paste these line of code.

module.exports = {
        pluginOptions: {
        electronBuilder: {
            builderOptions: {
                productName: "News App",
                appId: 'test.com',
                win: {
                    "target": [
                        "nsis"
                    ],
                  icon: 'public/svg.png',
                  "requestedExecutionLevel": "requireAdministrator"
                },
                "nsis": {
                    "installerIcon": "public/favicon.ico",
                    "uninstallerIcon": "public/favicon.ico",
                    "uninstallDisplayName": "CPU Monitor",
                    "license": "license.txt",
                    "oneClick": false,
                    "allowToChangeInstallationDirectory": true
                }
            },
        },
    },
    }