Aurelia 1.0 routing configureRouter never called

I tried to follow some tutorials on aurelia.io routing like this one http://www.tutorialspoint.com/aurelia/index.htm

I implemented a configureRouter method in my App class but it s never called

app.js

export class App {


        constructor()
        {
          console.log("app");
        }

        configureRouter(config, router){


          console.log("configureRouter");

          config.title = 'Aurelia';

          config.map([
              { route: ['','home'],  name: 'home',  
                moduleId: './components/home/home',  nav: true, title:'Home' },
              { route: 'about',  name: 'about',
                moduleId: './components/about/about',    nav: true, title:'About' }
          ]);

          this.router = router;
        }
    }

app.html

    <template>

      <nav>
          <ul>
            <li repeat.for = "row of router.navigation">
                <a href.bind = "row.href">${row.title}</a>
            </li>
          </ul>
      </nav>

    <router-view></router-view>
    </template>

As far as I understand, the configureRouter method in app.js is supposed to be called automatically when router-view is detected in the template, but it s not the case (and I dont get any errors in chrome console)

Any ideas?

Copyright Notice：Content Author:「Nico AD」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/39294287/aurelia-1-0-routing-configurerouter-never-called