Update vite build config

packages/light-client/vite.config.ts

@@ -1,11 +1,32 @@
+import path from "node:path";
+import fs from "node:fs/promises";
 import {defineConfig, mergeConfig} from "vite";
+import dts from "vite-plugin-dts";
 import {getBaseViteConfig} from "../../vite.base.config.js";
 
 import pkgJSON from "./package.json";
 
 export default mergeConfig(
   getBaseViteConfig(pkgJSON, {libName: "LightClient", entry: "src/index.browser.ts"}),
   defineConfig({
+    plugins: [
+      dts({
+        entryRoot: "src",
+        // It would be better to rollup all types into one file, But the current package.json.types field
+        // is pointing to other file that conflict with the entry file for bundle. If we decide to use one
+        // entry file for both package and bundle then this issue could be resolved
+        //
+        rollupTypes: false,
+        bundledPackages: ["@lodestar/*", "@chainsafe/*"],
+        exclude: ["test/**/*", "*.config.ts"],
+        async afterBuild() {
+          await fs.rename(
+            path.join(import.meta.dirname, "dist", "index.browser.d.ts"),
+            path.join(import.meta.dirname, "dist", "lightclient.min.d.mts")
+          );
+        },
+      }),
+    ],
     build: {
       rollupOptions: {
         output: {