Add silent option to daemon command

[melo]

Summary

Adds a -s or --silent option to the daemon command.

This will disable the startup "Web application available at..." message.

Motivation

On production environments, specially on K8s or ECS, the message is not particularly useful.

[kraih]

This should be very easy to test.

[melo]

Yes, I'll look for the proper place to put the tests.

Thank you.