Add /static to PSGI app for easier testing

app.psgi

@@ -5,6 +5,7 @@ use warnings;
 
 use Data::Random qw(rand_enum);
 use Plack::App::File;
+use Plack::Builder;
 use YAML::XS qw(LoadFile);
 use Template;
 
@@ -38,7 +39,9 @@ sub generate_genre {
   return join ' ', map { ucfirst } @genre;
 }
 
-my $app = sub {
+builder {
+  mount '/static' => Plack::App::File->new(root => 'static')->to_app(),
+  mount '/' => sub {
     my $genre = generate_genre();
     my $out = '';
     $template->process('index.tt', { genre => $genre }, \$out);
@@ -47,4 +50,5 @@ my $app = sub {
       [ 'Content-Type' => 'text/html' ],
       [ $out ]
     ];
+  },
 }