Issue with express static middleware and subdirectory

I have this folder as my website structure

-views
  -index
  -post
-public
  -css
  -js
  -images
-app.js

But a post link can be:

mywebsite.com/posts/a-link-example

So, when I use express static middleware like this:

app.use(express.static(__dirname + '/public'));

it only works in pages without a "subdirectory" like

example.com/home
example.com/contact

but not on

example.com/posts/post-name

I can use of course:

app.use('/posts, express.static(__dirname + '/public'));

but is there a better way to do it?

via nick