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/cli/definitions.d.ts

@@ -0,0 +1,37 @@
+import type { StdioOptions } from 'node:child_process';
+import type { AnyCommand } from './domain/command.js';
+import type { HelpPayload } from './domain/help-payload.js';
+export interface HelpDisplay {
+    shouldFire: () => boolean;
+    show: (payload: HelpPayload) => void;
+}
+export interface TextStyler {
+    bgWhite: (msg: string) => string;
+    black: (msg: string) => string;
+    dim: (msg: string) => string;
+    green: (msg: string) => string;
+    bold: (msg: string) => string;
+    bgGreen: (msg: string) => string;
+}
+export interface AstroVersionProvider {
+    readonly version: string;
+}
+export interface CommandRunner {
+    run: <T extends AnyCommand>(command: T, ...args: Parameters<T['run']>) => ReturnType<T['run']> | undefined;
+}
+export interface CommandExecutorOptions {
+    cwd?: string;
+    env?: Record<string, string | undefined>;
+    shell?: boolean;
+    input?: string;
+    stdio?: StdioOptions;
+}
+export interface CommandExecutor {
+    execute: (command: string, args?: Array<string>, options?: CommandExecutorOptions) => Promise<{
+        stdout: string;
+    }>;
+}
+export interface OperatingSystemProvider {
+    readonly name: NodeJS.Platform;
+    readonly displayName: string;
+}