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/regex/dist/cjs/utils-internals.d.ts

@@ -0,0 +1,15 @@
+/**
+Updates the array in place by incrementing each value greater than or equal to the threshold.
+@param {Array<number>} arr
+@param {number} threshold
+*/
+export function incrementIfAtLeast(arr: Array<number>, threshold: number): void;
+export const noncapturingDelim: any;
+/**
+@param {string} str
+@param {number} pos
+@param {string} oldValue
+@param {string} newValue
+@returns {string}
+*/
+export function spliceStr(str: string, pos: number, oldValue: string, newValue: string): string;