title: Serve static files in express doesn't work in different routes, only in root route
body: <p>I have make some research about this issue, but all the possible solutions doesn't work for me I don' know why.</p>
  
  <p>I am using page.js and express to develop my little app. When I serve my static files all works fine in my "/" (root) route. But when I navigate to other route, for example "/client-profile/:user_id", it seem like my static files doesn't serve, because my template show me only breaked links, and sometimes doesn't show me anything.</p>
  
  <p>When I use "inspect element" tool in my browser over one image in the "/" route, it shows me for example "/image.jpg", but when I go to other route ("/client-profile/:user_id") with the same image, it shows me "/client-profile/image.jpg"</p>
  
  <p>Here is my code:</p>
  
  <p><strong>server.js (express)</strong> </p>
  
  <pre><code>var express = require('express')
  var path = require('path')
  
  lisaPosApp.use(express.static(path.join(__dirname, '/public')))
  
  lisaPosApp.get('/client-profile/:user_id', function (req, res) {
    res.render('index', { title : '.: LISA | Usuarios | Loyalty Improvement Service Application :.' })
  })
  </code></pre>
  
  <p><strong>index.js (pagejs)</strong></p>
  
  <pre><code>var page = require('page')
  var templateClientProfile = require('./template')
  var request = require('superagent')
  var header = require('../header-n-left-menu')
  var utils = require('../utils')
  
  page('/client-profile/:user_id', utils.loadUserAuth, header, loadClientInfo, function (ctx, next) {
      $('title').html(`.: LISA | ${ctx.user.username} | Loyalty Improvement Service Application :.`)
    var mainContainer = document.getElementById('main-container')
  
    mainContainer.innerHTML = ''
    mainContainer.appendChild(templateClientProfile(ctx.user))
    document.getElementById('section-preloader').remove()
  
    $('select').material_select()
    $('ul.tabs').tabs()
  })
  
  function loadClientInfo (ctx, next) {
    request
      .get(`/api/client-profile/${ctx.params.user_id}`)
      .end(function (err, res) {
        if (err) return console.log(err)
  
        ctx.user = res.body
        next()
      })
  }
  </code></pre>
  
  <p>(Note: all my static files, no mattter what type, are in a folder named "public" in the root folder of the project)</p>
  
  <p>In advance, thanks a lot!</p>