How to serve nested static files in go server?

I am unable to serve a website using gin server. Here's the go code snippet:

router := gin.Default()
router.StaticFile("/", "./build/index.html")

and index.html has <link rel="modulepreload" href="/_app/immutable/pages/index.svelte-6d5b7005.js"/> and some css links too.

Now, the server serves index.html file fine but the js modules aren't being loaded.

How do I serve the index.html in a way that all the nested files/modules also get served
?

You have to serve whole directory

router.Static("/", "./build")

But double check if all files from build dir should be available publicly.