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/parse-latin/lib/plugin/merge-affix-symbol.d.ts

@@ -0,0 +1,2 @@
+export const mergeAffixSymbol: import("../../node_modules/unist-util-modify-children/lib/index.js").Modify<import("nlcst").Paragraph>;
+export type Paragraph = import('nlcst').Paragraph;