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/cli/infra/cli-command-runner.js

@@ -0,0 +1,18 @@
+class CliCommandRunner {
+  #helpDisplay;
+  constructor({
+    helpDisplay
+  }) {
+    this.#helpDisplay = helpDisplay;
+  }
+  run(command, ...args) {
+    if (this.#helpDisplay.shouldFire()) {
+      this.#helpDisplay.show(command.help);
+      return;
+    }
+    return command.run(...args);
+  }
+}
+export {
+  CliCommandRunner
+};