asp.net core's default application using docker starts with two launch urls - docker

Question

I created a basic Asp.net core 2.0 web application in the following way:
New Application => ASP.Net Core Web Application => Web Application =>
(MVC) => Change Authentication => Individual User Accounts (With docker enabled)
Debugging this will give you this:
This will obviously give you a 404, if you get rid of https://localhost:44360/ then the application is debugging there. I've seen this answer, but this didn't work for me.
I created a hosting.json as the answer suggested:
{
"server": "Microsoft.AspNetCore.Server.Kestrel",
"server.urls": "http://localhost:4000"
}
I added this to the Configure() method in startup:
var config = new ConfigurationBuilder()
.AddJsonFile("/app/hosting.json", optional: false)
.AddEnvironmentVariables(prefix: "ASPNETCORE_")
.Build();
var host = new WebHostBuilder()
.UseConfiguration(config)
.UseKestrel()
.UseContentRoot(Directory.GetCurrentDirectory())
.UseIISIntegration()
.UseStartup<Startup>()
.Build();
host.Run();
This didn't fix my startup issue. What am I doing wrong or what do i need to do to fix this debug issue?

Answer 1

I was seeing the same issue after creating a new project and installing Docker for Windows with Visual Studio Community 2017.
It appears that the docker-compose Property Pages had a bad Service URL property, which in my case was generated as: http://localhost:{ServicePort}/https://localhost:44339/
To fix the issue:
Right-click the docker-compose project
Select Properties
Replace Service URL with: http://localhost:{ServicePort}