fix(background): don't rely on NODE_ENV for loading renderer process

Author: nklayman

generator/templates/base/src/background.js

@@ -17,7 +17,7 @@ function createWindow () {
   // Create the browser window.
   win = new BrowserWindow({ width: 800, height: 600 })
 
-  if (isDevelopment || process.env.IS_TEST) {
+  if (process.env.WEBPACK_DEV_SERVER_URL) {
     // Load the url of the dev server if in development mode
     win.loadURL(process.env.WEBPACK_DEV_SERVER_URL)
     if (!process.env.IS_TEST) win.webContents.openDevTools()