Handle api error json (#18)

* Handle api error json

* Fix get vehicles error handling
Update .env.template

src/services/__mocks__/vehicles.js

@@ -11,7 +11,10 @@ const data = [
 
 const vehiclesAPI = {
   getVehicles: async (search, token) => { return { data: { data } }; },
-  addVehicle: async (vehicle, token) => { data.push(vehicle); },
+  addVehicle: async (vehicle, token) => { 
+    data.push(vehicle);
+    return vehicle;
+  },
 };
 
 export default vehiclesAPI;