Serve with Node/Express instead of nginx (matches working astroreal pattern)

- Add server.js: Express serves dist/ + injects env (GA_ID, FORM_EMAIL, GMAP) at runtime
- Container port now 4321 (identical to moreminimore-astroreal that deploys on EasyPanel)
- Remove nginx.conf + entrypoint.sh (no longer needed); Dockerfile uses node server.js
- Verified: pnpm build + node server.js -> all 40 pages serve 200, env injected, 0 leftovers

package.json

@@ -1,7 +1,8 @@
 {
-  "name": "stale-satellite",
+  "name": "mitsu-chaiyaporn",
   "type": "module",
-  "version": "0.0.1",
+  "version": "1.0.0",
+  "private": true,
   "engines": {
     "node": ">=22.12.0"
   },
@@ -9,9 +10,11 @@
     "dev": "astro dev",
     "build": "astro build",
     "preview": "astro preview",
+    "start": "node server.js",
     "astro": "astro"
   },
   "dependencies": {
-    "astro": "^7.1.6"
+    "astro": "^7.1.6",
+    "express": "^5.2.1"
   }
-}
+}