my $hdrs = Plack::Util::headers($resp->[1]);
$hdrs->set('Content-Security-Policy', CONTENT_SECURITY_POLICY);
$hdrs->set('Link', '<https://static.mindcoding.ro/static/slate.css>; rel=stylesheet') if $hdrs->get('Content-Type') =~ m,^text/html,;
my $hdrs = Plack::Util::headers($resp->[1]);
$hdrs->set('Content-Security-Policy', CONTENT_SECURITY_POLICY);
$hdrs->set('Link', '<https://static.mindcoding.ro/static/slate.css>; rel=stylesheet') if $hdrs->get('Content-Type') =~ m,^text/html,;