How to specify the path of static files and process them on the server?

Question

Express.js

There is a
-static
folder There is a
-server folder There is a -pages
folder Path to pages is specified Output file = fs.readFileSync(path.join(__dirname, '../../pages/') + 'index.html', 'utf8 '); The server returns index.html, but does not return styles and images Although there is a code above

path.join(__dirname, '../../pages/');

app.use(express.static(path.join(__dirname, '../../static/')));

The path is specified in index.html
<img src="/public/img/images/po.png">

And the file with the server is located in the folder server

Tell me, how can I configure the return of static files?
Taking into account that in pages there will be more folders with other pages