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/astro/dist/runtime/client/dev-toolbar/ui-library/highlight.d.ts

@@ -0,0 +1,16 @@
+import { type Icon } from './icons.js';
+declare const styles: readonly ["purple", "gray", "red", "green", "yellow", "blue"];
+type HighlightStyle = (typeof styles)[number];
+export declare class DevToolbarHighlight extends HTMLElement {
+    icon?: Icon | undefined | null;
+    _highlightStyle: HighlightStyle;
+    get highlightStyle(): "red" | "green" | "yellow" | "blue" | "gray" | "purple";
+    set highlightStyle(value: "red" | "green" | "yellow" | "blue" | "gray" | "purple");
+    static observedAttributes: string[];
+    shadowRoot: ShadowRoot;
+    constructor();
+    updateStyle(): void;
+    attributeChangedCallback(): void;
+    connectedCallback(): void;
+}
+export {};