Add frontend deploy scripts

frontend/astro.config.mjs

@@ -3,8 +3,14 @@ import { defineConfig } from 'astro/config';
 
 import tailwind from "@astrojs/tailwind";
 
+import node from "@astrojs/node";
+
 // https://astro.build/config
 export default defineConfig({
   output: "server",
   integrations: [tailwind()],
+
+  adapter: node({
+    mode: "standalone",
+  }),
 });