Add an overload for AddHangfireServer utilizing IServiceProvider

[penenkel]

This allows the configuration of BackgroundJobServerOptions to be based on other services, options, etc..

While there exists the workaround of registering the BackgroundJobServerOptions manually

services.AddSingleton(provider => {
var other = provider.getRequiredService<OtherOptions>();
return new BackgroundJobServerOptions
{
    Queues = new[] { "default", "misc", other.SomeQueueName},
    WorkerCount = 1,
};
});
services.AddHangfireServer();

This fails if one wants to register multiple HangfireServer with differing configurations (all based on some other service/options).

[odinserj]

Thanks @penenkel, will release this in version 1.7.20 today.