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/mdast-util-from-markdown/index.d.ts

@@ -0,0 +1,23 @@
+export type {Encoding, Token, Value} from 'micromark-util-types'
+export type {
+  CompileContext,
+  CompileData,
+  Extension,
+  Handles,
+  Handle,
+  OnEnterError,
+  OnExitError,
+  Options,
+  Transform
+} from './lib/types.js'
+export {fromMarkdown} from './lib/index.js'
+
+declare module 'micromark-util-types' {
+  interface TokenTypeMap {
+    listItem: 'listItem'
+  }
+
+  interface Token {
+    _spread?: boolean
+  }
+}