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-yang.js

@@ -0,0 +1,20 @@
+Prism.languages.yang = {
+	// https://tools.ietf.org/html/rfc6020#page-34
+	// http://www.yang-central.org/twiki/bin/view/Main/YangExamples
+	'comment': /\/\*[\s\S]*?\*\/|\/\/.*/,
+	'string': {
+		pattern: /"(?:[^\\"]|\\.)*"|'[^']*'/,
+		greedy: true
+	},
+	'keyword': {
+		pattern: /(^|[{};\r\n][ \t]*)[a-z_][\w.-]*/i,
+		lookbehind: true
+	},
+	'namespace': {
+		pattern: /(\s)[a-z_][\w.-]*(?=:)/i,
+		lookbehind: true
+	},
+	'boolean': /\b(?:false|true)\b/,
+	'operator': /\+/,
+	'punctuation': /[{};:]/
+};