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-server/error.js

@@ -0,0 +1,19 @@
+import { collectErrorMetadata } from "../core/errors/dev/index.js";
+import { createSafeError } from "../core/errors/index.js";
+import { formatErrorMessage } from "../core/messages.js";
+function recordServerError(loader, config, { logger }, _err) {
+  const err = createSafeError(_err);
+  try {
+    loader.fixStacktrace(err);
+  } catch {
+  }
+  const errorWithMetadata = collectErrorMetadata(err, config.root);
+  logger.error(null, formatErrorMessage(errorWithMetadata, logger.level() === "debug"));
+  return {
+    error: err,
+    errorWithMetadata
+  };
+}
+export {
+  recordServerError
+};