How can I use Twitter Bootstrap on Node.js and Express?
I know I have to put CSS and Javascript files in ./public directory (if it's set default). But when I look for how to use Twitter Bootstrap on Node.js and Express, I get to know there are many variants on using Twitter Bootstrap. 
For example, just put bootstrap CSS and JS files in appropriate directories, or specify :
<link rel='stylesheet' href='assets/css/bootstrap-responsive.css'>
<link rel='stylesheet' href='https://d396qusza40orc.cloudfront.net/startup%2Fcode%2Fbootstrap.js'> 
etc, and also there are two sources, normal and .min.css file, each with CSS and JS. So how can I serve the appropriate Bootstrap file in Node.js and Express?
Here's a first few lines of my current code (is it necessary?), which is not working with responsive design (it doesn't stack vertically when I narrow the screen to mimic the size of smartphones, and instead just scale down the size with each ratio being the same).
<!DOCTYPE html>
<html lang='en'>
<head>
    <meta charset='utf-8'>
    <title><%= title %></title>
    <meta name='viewport' content='width=device-width, initial-scale=1.0'>
    <link rel='stylesheet' href='/stylesheets/bootstrap.min.css'>
    <link rel='stylesheet' href='assets/css/bootstrap-responsive.css'>
    <script src='/javascripts/jquery-2.0.2.min.js'></script>
    <style type='text/css'>
        /* Large desktop */
        @media (min-width: 980px) {
            body {
                padding-top: 60px;
            }
        }
        /* smartphones */
        @media (max-width: 480px) {
            body {
                padding-top: 30px;
            }
        }
    </style>
</head>