如何将 Node 应用程序部署到 Heroku (H10 ERROR503)

Question

我的代码通过 localhost 运行良好，但是每当我尝试通过 'master' 分支中的 github 连接将其部署到 heroku 时，我在 heroku 日志中收到以下错误。

public class TypeDescriptionContext : ITypeDescriptorContext
{
    Control control;
    IServiceProvider provider;
    object instannce;
    PropertyDescriptor property;
    public TypeDescriptionContext(Control control,
        IServiceProvider provider, object instannce,
        PropertyDescriptor property)
    {
        this.control = control;
        this.provider = provider;
        this.instannce = instannce;
        this.property = property;
    }
    public IContainer Container => control.Site?.Container;
    public object Instance => instannce;
    public void OnComponentChanged() =>
        GetService<IComponentChangeService>()
        ?.OnComponentChanged(control, null, null, null);
    public bool OnComponentChanging() => true;
    public PropertyDescriptor PropertyDescriptor => property;
    public object GetService(Type type) => provider?.GetService(type);
    public T GetService<T>() => (T)this.GetService(typeof(T));
}

非常感谢任何提示或答案！

在客户端和服务器端创建 .env 文件