.net core 3.1 worker service - set EnvironmentName on publish

# Issue Title

Hello !
I'm trying to setup a worker service using the asp.net core 3.1 template provided by VS 2019 Enterprise.

# General

Steps to reproduce : Create a new project and run it : "Hosting Environment: Development", works as expected.


Create a FileSystem publish profile, and add `Test` to publish the worker to a testing environment for exemple


When launching the published version, HostingEnvironment is set to "Production", but i defined "Test" in the FolderProfile.pubxml


Is this a bug ? Or you don't publish worker services on another environments this way ?

I've also tried `dotnet publish /p:EnvironmentName=Test`, without success.

I also tried to generate manually a web.config file, containing

``, the worker service seems to ignore the web.config file.

Cannot run my application on custom environment, like Test or Staging !

PS : Works in Debug into VS, setting `DOTNET_ENVIRONMENT = Test` Environment variable


Thanks in advance

Edit : The final goal is to host this worker on a Windows Server 2012 R2 as a windows service (and managing different environments), `using Microsoft.Extensions.Hosting.WindowsServices, Version=3.1.1.0`