feat: migrate to vercel

astro.config.mjs

@@ -1,5 +1,6 @@
 import { defineConfig } from "astro/config";
 import mdx from "@astrojs/mdx";
+import vercel from "@astrojs/vercel";
 import rehypeExternalLinks from "rehype-external-links";
 import rehypeKatex from "rehype-katex";
 import remarkMath from "remark-math";
@@ -37,6 +38,8 @@ const daylight = {
 };
 
 export default defineConfig({
+  output: "static",
+  adapter: vercel(),
   build: {
     format: "file",
   },