Mojolicious - send static file not in public path

gistfile1.PL

package MyApp::Controller;

use strict;
use warnings;    
use base 'Mojolicious::Controller';
use Path::Class;
      
sub sendfile {
    my $self = shift;
    my %args = @_;
    if ( -e $args{file} and -r _ ) {
        $self->res->headers->content_type($args{content_type});
        $self->res->body(scalar file($args{file})->slurp);
        $self->res->code(200) unless $self->res->code;
    }
    else {
        $self->res->headers->content_type('text/plain');
        $self->res->body('500 Internal ServerError');
        $self->res->code(500);
    }
}

package MyApp::Example;

use strict;
use warnings;
use base 'MyApp::Controller';
      
sub hoge {
    my $self = shift;
    $self->sendfile(
        file => $self->app->home->rel_file('test.txt'),
        content_type => 'text/plain'
    );
}
1;