add express-validator, add body parser middleware, support some more errors in error handler middleware

website/src/middlewares/api-v3/index.js

@@ -1,8 +1,17 @@
 // This module is only used to attach middlewares to the express app
 
 import errorHandler from './errorHandler';
+import bodyParser from 'body-parser';
 
 export default function attachMiddlewares (app) {
+
+  // Parse query parameters and json bodies
+  // TODO handle errors
+  app.use(bodyParser.urlencoded(
+    extended: true, // Uses 'qs' library as old connect middleware
+  }));
+  app.use(bodyParser.json());
+
   // Error handler middleware, define as the last one
   app.use(errorHandler);
 }