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/css-tree/lib/lexer/generic-const.js

@@ -0,0 +1,8 @@
+// https://drafts.csswg.org/css-cascade-5/
+export const cssWideKeywords = [
+    'initial',
+    'inherit',
+    'unset',
+    'revert',
+    'revert-layer'
+];