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/common-ancestor-path/README.md

@@ -0,0 +1,28 @@
+# common-ancestor-path
+
+Find the common ancestor of 2 or more paths on Windows or Unix
+
+## USAGE
+
+Give it two or more path strings, and it'll do the thing.
+
+```js
+const ancestor = require('common-ancestor-path')
+
+// output /a/b
+console.log(ancestor('/a/b/c/d', '/a/b/x/y/z', '/a/b/c/i/j/k'))
+
+// normalizes separators, but NOT cases, since it matters sometimes
+console.log(ancestor('C:\\a\\b\\c', 'C:\\a\\b\\x'))
+
+// no common ancestor on different windows drive letters
+// so, this returns null
+console.log(ancestor('c:\\a\\b\\c', 'd:\\d\\e\\f'))
+```
+
+## API
+
+`commonAncestorPath(...paths)`
+
+Returns the nearest (deepest) common ancestor path, or `null` if on
+different roots on Windows.