diff --git a/moonbit-tour/build/build.mts b/moonbit-tour/build/build.mts
index 7495e6c7..e5c23a74 100644
--- a/moonbit-tour/build/build.mts
+++ b/moonbit-tour/build/build.mts
@@ -2,6 +2,7 @@ import * as chokidar from "chokidar";
 import * as esbuild from "esbuild";
 import { tailwindPlugin } from "esbuild-plugin-tailwindcss";
 import * as fs from "fs/promises";
+import * as http from "http";
 import * as path from "path";
 import * as page from "./page";
 
@@ -24,6 +25,8 @@ const plugin = (): esbuild.Plugin => {
       build.onEnd(async () => {
         console.log("end build");
 
+        await fs.cp("./public", "./dist", { recursive: true });
+
         const names = ["lsp-server.js", "moonc-worker.js", "onig.wasm"];
         await Promise.all(
           names.map((name) => {
@@ -67,7 +70,13 @@ const ctx = await esbuild.context({
     ".ttf": "file",
     ".woff2": "file",
   },
-  logLevel: "info",
+  drop: isDev ? [] : ["console", "debugger"],
+  dropLabels: isDev ? [] : ["DEV"],
+  banner: isDev
+    ? {
+        js: '(() => new EventSource("/esbuild").onmessage = () => location.reload())();',
+      }
+    : undefined,
   plugins: [tailwindPlugin(), plugin()],
 });
 
@@ -77,10 +86,42 @@ if (isBuild) {
   process.exit(0);
 }
 
+const clients: http.ServerResponse[] = [];
+
 if (isDev) {
-  await ctx.serve({
+  const { host, port } = await ctx.serve({
     servedir: "dist",
   });
+  const server = http.createServer((req, res) => {
+    if (req.url === "/esbuild") {
+      clients.push(
+        res.writeHead(200, {
+          "Content-Type": "text/event-stream",
+          "Cache-Control": "no-cache",
+          Connection: "keep-alive",
+        }),
+      );
+      return;
+    }
+    req.pipe(
+      http.request(
+        {
+          host,
+          port,
+          path: req.url,
+          method: req.method,
+          headers: req.headers,
+        },
+        (prxRes) => {
+          res.writeHead(prxRes.statusCode || 0, prxRes.headers);
+          prxRes.pipe(res, { end: true });
+        },
+      ),
+      { end: true },
+    );
+  });
+  server.listen(3000);
+  console.log(`Local: http://localhost:3000`);
 }
 
 if (isWatch) {
@@ -91,5 +132,7 @@ if (isWatch) {
     .on("all", async (e, path) => {
       console.log(`[watch] ${e} ${path}`);
       await ctx.rebuild();
+      clients.forEach((res) => res.write("data: update\n\n"));
+      clients.length = 0;
     });
 }
diff --git a/moonbit-tour/package.json b/moonbit-tour/package.json
index 44fb5048..b41be1b6 100644
--- a/moonbit-tour/package.json
+++ b/moonbit-tour/package.json
@@ -5,7 +5,7 @@
   "type": "module",
   "scripts": {
     "dev": "DEV=true tsx ./build/build.mts --watch",
-    "build": "tsc && tsx ./build/build.mts --build",
+    "build": "tsc && DEV=false tsx ./build/build.mts --build",
     "preview": "serve dist",
     "format": "prettier --write ."
   },