Bootstrap Contact Form PHP using Grunt Build

I am working on a Web Project, that I have built using bootstrap. I am looking for a way around building a contact form page for the web project. I already have the php code for the contact form. The form just needs to send an email, no database required. I call an external file called process.php from my contact.php page.

My problem is that I am not that familiar with editing the Gruntfile.js and the grunt commands itself. When I grunt build my project, it strips the php out and just builds all the html files. However I found a solution where it also builds the php but the strips all my external plugins, i.e slick slider, colorbox etc. I have even tried injecting this using bower install.

Can anyone give me a step by step tutorial on how to get this working.

Thanks in advance