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/css-tree/lib/syntax/node/SupportsDeclaration.js

@@ -0,0 +1,34 @@
+import {
+    LeftParenthesis,
+    RightParenthesis
+} from '../../tokenizer/index.js';
+
+export const name = 'SupportsDeclaration';
+export const structure = {
+    declaration: 'Declaration'
+};
+
+export function parse() {
+    const start = this.tokenStart;
+
+    this.eat(LeftParenthesis);
+    this.skipSC();
+
+    const declaration = this.Declaration();
+
+    if (!this.eof) {
+        this.eat(RightParenthesis);
+    }
+
+    return {
+        type: 'SupportsDeclaration',
+        loc: this.getLocation(start, this.tokenStart),
+        declaration
+    };
+}
+
+export function generate(node) {
+    this.token(LeftParenthesis, '(');
+    this.node(node.declaration);
+    this.token(RightParenthesis, ')');
+}