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/assets/fonts/infra/minifiable-css-renderer.d.ts

@@ -0,0 +1,15 @@
+import type { CssRenderer } from '../definitions.js';
+import type { CssProperties } from '../types.js';
+export declare function renderFontFace(properties: CssProperties, minify: boolean): string;
+export declare function renderCssVariable(key: string, values: Array<string>, minify: boolean): string;
+export declare function withFamily(family: string, properties: CssProperties): CssProperties;
+/** If the value contains spaces (which would be incorrectly interpreted), we wrap it in quotes. */
+export declare function handleValueWithSpaces(value: string): string;
+export declare class MinifiableCssRenderer implements CssRenderer {
+    #private;
+    constructor({ minify }: {
+        minify: boolean;
+    });
+    generateFontFace(family: string, properties: CssProperties): string;
+    generateCssVariable(key: string, values: Array<string>): string;
+}