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/csso/cjs/clean/Declaration.cjs

@@ -0,0 +1,18 @@
+'use strict';
+
+const cssTree = require('css-tree');
+
+function cleanDeclartion(node, item, list) {
+    if (node.value.children && node.value.children.isEmpty) {
+        list.remove(item);
+        return;
+    }
+
+    if (cssTree.property(node.property).custom) {
+        if (/\S/.test(node.value.value)) {
+            node.value.value = node.value.value.trim();
+        }
+    }
+}
+
+module.exports = cleanDeclartion;