Date of new todos is the date of when the multi-container-app boots

[chrycon]

Description

As I was following the short tutorial for the multi-container-app, I noticed that all todos have the same date next to them, which is also the date of when the app boots.

Reproduce

1. docker-compose up -d
2. Add some todos over a span of 2-3 minutes.

Expected behavior

Each todo has its own timestamp for the time it was created. I believe the logic from models/Todo.js should move to routes/front.js.

[chrycon]

@nunocoracao I am not sure if you accept contributions in this repo, but I'd be happy to fix this.