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/runtime/server/render/instruction.d.ts

@@ -0,0 +1,31 @@
+import type { HydrationMetadata } from '../hydration.js';
+export type RenderDirectiveInstruction = {
+    type: 'directive';
+    hydration: HydrationMetadata;
+};
+export type RenderHeadInstruction = {
+    type: 'head';
+};
+/**
+ * Render a renderer-specific hydration script before the first component of that
+ * framework
+ */
+export type RendererHydrationScriptInstruction = {
+    type: 'renderer-hydration-script';
+    rendererName: string;
+    render: () => string;
+};
+export type MaybeRenderHeadInstruction = {
+    type: 'maybe-head';
+};
+export type ServerIslandRuntimeInstruction = {
+    type: 'server-island-runtime';
+};
+export type RenderScriptInstruction = {
+    type: 'script';
+    id: string;
+    content: string;
+};
+export type RenderInstruction = RenderDirectiveInstruction | RenderHeadInstruction | MaybeRenderHeadInstruction | RendererHydrationScriptInstruction | ServerIslandRuntimeInstruction | RenderScriptInstruction;
+export declare function createRenderInstruction<T extends RenderInstruction>(instruction: T): T;
+export declare function isRenderInstruction(chunk: any): chunk is RenderInstruction;