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/client/dev-toolbar/ui-library/index.d.ts

@@ -0,0 +1,10 @@
+export { DevToolbarBadge } from './badge.js';
+export { DevToolbarButton } from './button.js';
+export { DevToolbarCard } from './card.js';
+export { DevToolbarHighlight } from './highlight.js';
+export { DevToolbarIcon } from './icon.js';
+export { DevToolbarRadioCheckbox } from './radio-checkbox.js';
+export { DevToolbarSelect } from './select.js';
+export { DevToolbarToggle } from './toggle.js';
+export { DevToolbarTooltip } from './tooltip.js';
+export { DevToolbarWindow } from './window.js';