diff --git a/build/prepare-sites-build.mjs b/build/prepare-sites-build.mjs
new file mode 100644
index 0000000..2863e3c
--- /dev/null
+++ b/build/prepare-sites-build.mjs
@@ -0,0 +1,11 @@
+import { copyFile, mkdir } from 'node:fs/promises';
+import { resolve } from 'node:path';
+
+const root = process.cwd();
+const serverDirectory = resolve(root, 'dist', 'server');
+
+await mkdir(serverDirectory, { recursive: true });
+await copyFile(
+    resolve(root, 'worker', 'index.js'),
+    resolve(serverDirectory, 'index.js'),
+);
diff --git a/package.json b/package.json
index e7d1f96..c0424dd 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "type": "module",
   "scripts": {
     "dev": "vite",
-    "build": "tsc -b && vite build",
+    "build": "tsc -b && vite build && node build/prepare-sites-build.mjs",
     "lint": "eslint .",
     "preview": "vite preview"
   },
diff --git a/worker/index.js b/worker/index.js
new file mode 100644
index 0000000..a163804
--- /dev/null
+++ b/worker/index.js
@@ -0,0 +1,18 @@
+const worker = {
+    async fetch(request, env) {
+        const response = await env.ASSETS.fetch(request);
+
+        if (
+            response.status !== 404 ||
+            request.method !== 'GET' ||
+            !request.headers.get('accept')?.includes('text/html')
+        ) {
+            return response;
+        }
+
+        const indexUrl = new URL('/index.html', request.url);
+        return env.ASSETS.fetch(new Request(indexUrl, request));
+    },
+};
+
+export default worker;