Add Keystatic CMS and refresh landing experience

astro.config.mjs

@@ -1,6 +1,8 @@
 // @ts-check
 import { defineConfig } from 'astro/config';
 import node from '@astrojs/node';
+import react from '@astrojs/react';
+import keystatic from '@keystatic/astro';
 
 // https://astro.build/config
 export default defineConfig({
@@ -8,4 +10,5 @@ export default defineConfig({
   adapter: node({
     mode: 'standalone',
   }),
+  integrations: [react(), keystatic()],
 });