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/content/loaders/errors.d.ts

@@ -0,0 +1,20 @@
+import type { ZodError } from 'zod';
+export declare class LiveCollectionError extends Error {
+    readonly collection: string;
+    readonly message: string;
+    readonly cause?: Error | undefined;
+    constructor(collection: string, message: string, cause?: Error | undefined);
+    static is(error: unknown): error is LiveCollectionError;
+}
+export declare class LiveEntryNotFoundError extends LiveCollectionError {
+    constructor(collection: string, entryFilter: string | Record<string, unknown>);
+    static is(error: unknown): error is LiveEntryNotFoundError;
+}
+export declare class LiveCollectionValidationError extends LiveCollectionError {
+    constructor(collection: string, entryId: string, error: ZodError);
+    static is(error: unknown): error is LiveCollectionValidationError;
+}
+export declare class LiveCollectionCacheHintError extends LiveCollectionError {
+    constructor(collection: string, entryId: string | undefined, error: ZodError);
+    static is(error: unknown): error is LiveCollectionCacheHintError;
+}