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/preferences/defaults.js

@@ -0,0 +1,18 @@
+const DEFAULT_PREFERENCES = {
+  devToolbar: {
+    /** Specifies whether the user has the Dev Overlay enabled */
+    enabled: true
+  },
+  checkUpdates: {
+    /** Specifies whether the user has the update check enabled */
+    enabled: true
+  },
+  // Temporary variables that shouldn't be exposed to the users in the CLI, but are still useful to store in preferences
+  _variables: {
+    /** Time since last update check */
+    lastUpdateCheck: 0
+  }
+};
+export {
+  DEFAULT_PREFERENCES
+};