refactor: Move Astro to root, use PORT env (default 80), allow all hosts

- Move Astro files from dealplustech-astro/ to project root
- Update Dockerfile: PORT environment variable (default 80)
- Add vite.config.ts with allowedHosts: true
- Matches nixpacks behavior for Easypanel deployment
- No hardcoded ports or domains

node_modules/prismjs/components/prism-hpkp.js

@@ -0,0 +1,14 @@
+/**
+ * Original by Scott Helme.
+ *
+ * Reference: https://scotthelme.co.uk/hpkp-cheat-sheet/
+ */
+
+Prism.languages.hpkp = {
+	'directive': {
+		pattern: /\b(?:includeSubDomains|max-age|pin-sha256|preload|report-to|report-uri|strict)(?=[\s;=]|$)/i,
+		alias: 'property'
+	},
+	'operator': /=/,
+	'punctuation': /;/
+};