my $resp = $app->($_[0]);
my $hdrs = Plack::Util::headers($resp->[1]);
$hdrs->set('Content-Security-Policy', CONTENT_SECURITY_POLICY);
my $resp = $app->($_[0]);
my $hdrs = Plack::Util::headers($resp->[1]);
$hdrs->set('Content-Security-Policy', CONTENT_SECURITY_POLICY);