Unable to read the back end api from Electron angular app

Question

Im trying to fetch the data from the back end api in electron application. Origin as showing as "file://"

i tried to set the proxy for this but still not working. Please help me on this. 

Here is my code

const electron = require('electron')

const cors = require('cors');

// Module to control application life.

const app = electron.app

// Module to create native browser window.

const BrowserWindow = electron.BrowserWindow

const port = 3000

const path = require('path')

const url = require('url')

var fs = require('fs');

var pac = require('pac-resolver');

let mainWindow

let ProxyFunc

let pacVariable

function createWindow () {

// Create the browser window.

mainWindow = new BrowserWindow({width: 800, height: 600})

app.commandLine.appendSwitch('proxy-server', '172.18.18.64');

var FindProxyForURL = pac(fs.readFileSync('dist/website/assets/pacfile.js'));

FindProxyForURL('https://172.18.18.64/api/rest/security/login').then((res) => {

});

mainWindow.webContents.session.setProxy({ proxyRules: 'https://172.18.18.64:8080' }, function () {

mainWindow.loadURL(path.join('file://', __dirname, 'dist/website/index.html'));

});

mainWindow.webContents.openDevTools({ mode: 'bottom' });

mainWindow.on('closed', function () {

mainWindow = null

})

}

app.on('ready', () => {

console.log('Ready');

createWindow();

});

app.on('window-all-closed', function () {

// On OS X 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', function () {

// On OS X 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 (mainWindow === null) {

createWindow()

}

})