Update Readme

README.md

 build and run MongoDB and Node.js API with `orders.json` dump:
 
-(run `mongo-seed` first !!)
+```
+docker-compose up --build -d 
+```
+
+if you encounter any problem (no order db), run `mongo-seed` first :
 
 ```
 docker-compose up --build -d mongo-seed
 docker-compose up -d
 ```
 
-
-
 use mongodb (mongo shell):
 
 ```

api/app/queries.js

@@ -21,8 +21,9 @@ exports.byCustomerPseudo = (req, res) => {
     db.collection('orders').find({ 'customer.pseudo': { $eq: req.params.pseudo } }).toArray((err, docs) => {
         if (err) {
             console.log(err);
+            res.send(err);
         }
         console.log(docs);
-        res.send(docs);
+        res.json(docs);
     });
 }