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-to-markdown/lib/util/pattern-in-scope.js

@@ -0,0 +1,41 @@
+/**
+ * @import {ConstructName, Unsafe} from 'mdast-util-to-markdown'
+ */
+
+/**
+ * @param {Array<ConstructName>} stack
+ * @param {Unsafe} pattern
+ * @returns {boolean}
+ */
+export function patternInScope(stack, pattern) {
+  return (
+    listInScope(stack, pattern.inConstruct, true) &&
+    !listInScope(stack, pattern.notInConstruct, false)
+  )
+}
+
+/**
+ * @param {Array<ConstructName>} stack
+ * @param {Unsafe['inConstruct']} list
+ * @param {boolean} none
+ * @returns {boolean}
+ */
+function listInScope(stack, list, none) {
+  if (typeof list === 'string') {
+    list = [list]
+  }
+
+  if (!list || list.length === 0) {
+    return none
+  }
+
+  let index = -1
+
+  while (++index < list.length) {
+    if (stack.includes(list[index])) {
+      return true
+    }
+  }
+
+  return false
+}