feat: Upgrade to Astro with full PDPA compliance

PDPA Features:
✅ Cookie consent banner
✅ Consent logging API
✅ Admin dashboard
✅ Privacy Policy
✅ Terms & Conditions

Technical:
✅ Astro 5.x + Tailwind v4
✅ Docker on port 80
✅ SQLite database
✅ 15 pages built

Ready for Easypanel deployment.

node_modules/is-docker/index.d.ts

@@ -0,0 +1,13 @@
+/**
+Check if the process is running inside a Docker container.
+
+@example
+```
+import isDocker from 'is-docker';
+
+if (isDocker()) {
+	console.log('Running inside a Docker container');
+}
+```
+*/
+export default function isDocker(): boolean;