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/plugins/remove-initial-line-feed/prism-remove-initial-line-feed.js

@@ -0,0 +1,21 @@
+(function () {
+
+	if (typeof Prism === 'undefined' || typeof document === 'undefined') {
+		return;
+	}
+
+	Prism.hooks.add('before-sanity-check', function (env) {
+		if (env.code) {
+			var pre = env.element.parentNode;
+			var clsReg = /(?:^|\s)keep-initial-line-feed(?:\s|$)/;
+			if (
+				pre && pre.nodeName.toLowerCase() === 'pre' &&
+				// Apply only if nor the <pre> or the <code> have the class
+				(!clsReg.test(pre.className) && !clsReg.test(env.element.className))
+			) {
+				env.code = env.code.replace(/^(?:\r?\n|\r)/, '');
+			}
+		}
+	});
+
+}());