Tidy up when guests are gone

gistfile1.pl

#!/usr/bin/env perl
use Mojolicious::Lite;

get '/' => sub {
  my $c = shift;
  $c->render_text('Hallo!');
  $c->on_finish(
    sub {
      my $c = shift;
      sleep(3);
      $c->app->log->debug('finished');
    });
};

app->start;