Foo.pm

package Foo;
use Mojo::Base 'Mojolicious';

# This method will run once at server start
sub startup {
  my $self = shift;

  # Routes
  my $r = $self->routes;

  # Normal route to controller
  my $foo = $r->route('/api')->to('bar#baz', namespace => 'Example');
  $foo->route('/nested')->to('bar#nested');
}

1;