use Plack::Runner;
if (my $ps = fork) {
    $log->info("successfully spawned PID $ps");
    $SIG{CHLD} = "IGNORE";
} else {
    $log->info("starting Dancer2 as PID $$");
    my @args = split(' ', $cmd);
    my $runner = Plack::Runner->new;
    $runner->parse_options(@args) or $log->logdie("Plack::Runner failed to parse startup options");
    $runner->run or $log->logdie("failed to start Dancer2 app");
}