Not able to open virtual host name instead of localhost:3000

I really wanna use browser-sync in my workflow but the only problem is I’m using Nginx virtual host domains on my local for serving my angular website which in turns uses the backend rest apis made in laravel which sets the cors thing and I have made whitelist entry of my site (http://mj.dev) in the backend for it. Now, using browser Sync with gulp only opens the site with localhost:3000 which is unacceptable for my situation. I tried using

gulp.task('browser-sync', function() {
    browserSync.init({        
        proxy: 'mj.dev'        
    })
})

but didn’t work out. Can someone help me with this.

[shakyShane]

@paramsinghvc

gulp.task('browser-sync', function() {
    browserSync.init();
});

^ this will give you a snippet in the terminal that you can paste into your website

[paramsinghvc]

@shakyShane Please a little more explanation or a code sample.