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/config/entrypoint.js

@@ -0,0 +1,27 @@
+import { fontProviders } from "../assets/fonts/providers/index.js";
+import { mergeConfig } from "../core/config/merge.js";
+import { validateConfig } from "../core/config/validate.js";
+import { envField } from "../env/config.js";
+import { defineConfig, getViteConfig } from "./index.js";
+function sharpImageService(config = {}) {
+  return {
+    entrypoint: "astro/assets/services/sharp",
+    config
+  };
+}
+function passthroughImageService() {
+  return {
+    entrypoint: "astro/assets/services/noop",
+    config: {}
+  };
+}
+export {
+  defineConfig,
+  envField,
+  fontProviders,
+  getViteConfig,
+  mergeConfig,
+  passthroughImageService,
+  sharpImageService,
+  validateConfig
+};