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/p-limit/index.d.ts

@@ -0,0 +1,81 @@
+export type LimitFunction = {
+	/**
+	The number of promises that are currently running.
+	*/
+	readonly activeCount: number;
+
+	/**
+	The number of promises that are waiting to run (i.e. their internal `fn` was not called yet).
+	*/
+	readonly pendingCount: number;
+
+	/**
+	Get or set the concurrency limit.
+	*/
+	concurrency: number;
+
+	/**
+	Discard pending promises that are waiting to run.
+
+	This might be useful if you want to teardown the queue at the end of your program's lifecycle or discard any function calls referencing an intermediary state of your app.
+
+	Note: This does not cancel promises that are already running.
+	*/
+	clearQueue: () => void;
+
+	/**
+	@param fn - Promise-returning/async function.
+	@param arguments - Any arguments to pass through to `fn`. Support for passing arguments on to the `fn` is provided in order to be able to avoid creating unnecessary closures. You probably don't need this optimization unless you're pushing a lot of functions.
+	@returns The promise returned by calling `fn(...arguments)`.
+	*/
+	<Arguments extends unknown[], ReturnType>(
+		function_: (...arguments_: Arguments) => PromiseLike<ReturnType> | ReturnType,
+		...arguments_: Arguments
+	): Promise<ReturnType>;
+};
+
+/**
+Run multiple promise-returning & async functions with limited concurrency.
+
+@param concurrency - Concurrency limit. Minimum: `1`.
+@returns A `limit` function.
+*/
+export default function pLimit(concurrency: number): LimitFunction;
+
+export type Options = {
+	/**
+	Concurrency limit.
+
+ 	Minimum: `1`.
+	*/
+	readonly concurrency: number;
+};
+
+/**
+Returns a function with limited concurrency.
+
+The returned function manages its own concurrent executions, allowing you to call it multiple times without exceeding the specified concurrency limit.
+
+Ideal for scenarios where you need to control the number of simultaneous executions of a single function, rather than managing concurrency across multiple functions.
+
+@param function_ - Promise-returning/async function.
+@return Function with limited concurrency.
+
+@example
+```
+import {limitFunction} from 'p-limit';
+
+const limitedFunction = limitFunction(async () => {
+	return doSomething();
+}, {concurrency: 1});
+
+const input = Array.from({length: 10}, limitedFunction);
+
+// Only one promise is run at once.
+await Promise.all(input);
+```
+*/
+export function limitFunction<Arguments extends unknown[], ReturnType>(
+	function_: (...arguments_: Arguments) => PromiseLike<ReturnType> | ReturnType,
+	option: Options
+): (...arguments_: Arguments) => Promise<ReturnType>;