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/astro/dist/vite-plugin-astro/metadata.js

@@ -0,0 +1,21 @@
+function getAstroMetadata(modInfo) {
+  if (modInfo.meta?.astro) {
+    return modInfo.meta.astro;
+  }
+  return void 0;
+}
+function createDefaultAstroMetadata() {
+  return {
+    hydratedComponents: [],
+    clientOnlyComponents: [],
+    serverComponents: [],
+    scripts: [],
+    propagation: "none",
+    containsHead: false,
+    pageOptions: {}
+  };
+}
+export {
+  createDefaultAstroMetadata,
+  getAstroMetadata
+};