Update Astro configuration to switch from Netlify to Node adapter and update dependencies

- Replace Netlify adapter with Node adapter in astro.config.ts for standalone mode.
- Update package.json to reflect the new dependency on @astrojs/node.
- Modify package-lock.json to include updated versions of dependencies and remove Netlify-specific configurations from the contact form.

astro.config.ts

@@ -8,7 +8,7 @@ import tailwind from '@astrojs/tailwind';
 import mdx from '@astrojs/mdx';
 import react from '@astrojs/react';
 import partytown from '@astrojs/partytown';
-import netlify from '@astrojs/netlify';
+import node from '@astrojs/node';
 import icon from 'astro-icon';
 import compress from 'astro-compress';
 import type { AstroIntegration } from 'astro';
@@ -24,7 +24,7 @@ const whenExternalScripts = (items: (() => AstroIntegration) | (() => AstroInteg
 
 export default defineConfig({
   output: 'server',
-  adapter: netlify(),
+  adapter: node({ mode: 'standalone' }),
 
 
   i18n: {