Dart服务端部署至Ubuntu服务器执行dart run后终端返回Killed问题求助

各位大佬好，我遇到个棘手的问题想请教下：

我写的这个Dart服务器项目在本地PC上运行完全正常，但部署到Ubuntu 20.04 (LTS) x64服务器上执行dart run后，终端直接返回Killed，完全没法正常启动服务。

先说明下我的服务器环境：Ubuntu 20.04 (LTS) x64

我用来测试的代码如下：

import 'dart:io';

import 'package:shelf/shelf.dart';

import 'package:shelf/shelf_io.dart' as shelf_io;

import 'package:shelf_router/shelf_router.dart' as shelf_router;

import 'package:shelf_static/shelf_static.dart' as shelf_static;

Future main(List<String> arguments) async {
  final cascade = Cascade().add(_staticHandler).add(_router);
  final server = await shelf_io.serve(cascade.handler, InternetAddress.anyIPv4, 8085);
  print('\nServer is running\naddress:${server.address.address}\nhost:${server.address.host}\nport: ${server.port}\n');
}

final _staticHandler = shelf_static.createStaticHandler('public_folder', defaultDocument: 'index.html');

final _router = shelf_router.Router()
  ..all('/<ignored|.*>', (Request request) {
    return Response.internalServerError();
  });

项目的pubspec.yaml依赖配置：

dependencies:
  path: ^1.8.0
  html: ^0.15.1
  http_parser: ^4.0.2
  shelf: ^1.4.0
  shelf_router: ^1.1.3
  shelf_multipart: ^1.0.0
  shelf_static: ^1.1.1
  mongo_dart: ^0.9.1
  mime: ^1.0.2
  mailer: ^6.0.0
  synchronized: ^3.0.1
  pdf: ^3.10.1

我是按照官方步骤安装的Dart SDK，具体操作命令如下：

sudo apt update
sudo apt install apt-transport-https
wget -qO- https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo gpg --dearmor -o /usr/share/keyrings/dart.gpg
echo 'deb [signed-by=/usr/share/keyrings/dart.gpg arch=amd64] https://storage.googleapis.com/download.dartlang.org/linux/debian stable main' | sudo tee /etc/apt/sources.list.d/dart_stable.list
sudo apt update
sudo apt install dart

安装完成后执行dart --version，输出结果为：
Dart SDK version: 2.19.6 (stable) (Unknown timestamp) on "linux_x64"

另外我测试了最基础的Dart代码，比如：

void main(){
  print('main');
}

执行dart run是可以正常输出main的，说明Dart环境本身没问题。

有没有大佬遇到过类似的情况？到底是什么原因导致服务启动直接被Killed呢？

备注：内容来源于stack exchange，提问作者Sittiphan Sittisak