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-arff.js

@@ -0,0 +1,10 @@
+Prism.languages.arff = {
+	'comment': /%.*/,
+	'string': {
+		pattern: /(["'])(?:\\.|(?!\1)[^\\\r\n])*\1/,
+		greedy: true
+	},
+	'keyword': /@(?:attribute|data|end|relation)\b/i,
+	'number': /\b\d+(?:\.\d+)?\b/,
+	'punctuation': /[{},]/
+};