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/property-information/lib/util/merge.js

@@ -0,0 +1,27 @@
+/**
+ * @import {Info, Space} from 'property-information'
+ */
+
+import {Schema} from './schema.js'
+
+/**
+ * @param {ReadonlyArray<Schema>} definitions
+ *   Definitions.
+ * @param {Space | undefined} [space]
+ *   Space.
+ * @returns {Schema}
+ *   Schema.
+ */
+export function merge(definitions, space) {
+  /** @type {Record<string, Info>} */
+  const property = {}
+  /** @type {Record<string, string>} */
+  const normal = {}
+
+  for (const definition of definitions) {
+    Object.assign(property, definition.property)
+    Object.assign(normal, definition.normal)
+  }
+
+  return new Schema(property, normal, space)
+}