renamed admin_view dir to routing

src/index.js

@@ -4,11 +4,11 @@
  */
 import server from './server';
 import colors from 'colors';
-import router from './admin_view/admin_router';
+import router from './routing/admin_router';
 import passport from 'passport';
 
 // setting up l'interface admin des BDD
-server.use('/adminview',router); // catches and resolves HTTP requests to paths '/adminview/*'
+server.use('/',router); // catches and resolves HTTP requests to paths '/adminview/*'
 
 // gere les requetes de login du front
 server.post('/login',