Showing the current time using templates

package App;
use Dancer2;
use DateTime;

get '/' => sub {
    my $dt = DateTime->now;
    return template 'page', {
        timestamp => $dt->strftime( '%Y-%m-%d %H:%M:%S' ),
    };
};

App->to_app;

<h1>Hello World!</h1>
[% timestamp %]

use strict;
use warnings;

use Test::More;
use Plack::Test;
use Plack::Util;
use HTTP::Request::Common;

my $app = Plack::Util::load_psgi './app.psgi';

my $test = Plack::Test->create($app);
my $res = $test->request(GET '/');

is $res->status_line, '200 OK', 'Status';
like $res->content, qr{<h1>Hello World!</h1>};
like $res->content, qr{\d\d\d\d-\d\d-\d\d \d\d:\d\d:\d\d};

done_testing();