Only change the webhost url if not running in a container

Author: reakaleek

src/docs-builder/Http/DocumentationWebHost.cs

@@ -54,7 +54,13 @@ public DocumentationWebHost(string? path, int port, ILoggerFactory logger, IFile
 		builder.Services.AddHostedService<ReloadGeneratorService>();
 
 		//builder.Services.AddSingleton(logger);
-		builder.WebHost.UseUrls($"http://localhost:{port}");
+
+		// See https://learn.microsoft.com/en-us/dotnet/core/tools/dotnet-environment-variables#dotnet_running_in_container-and-dotnet_running_in_containers
+		// This way use the default port when running in a container
+		if (string.IsNullOrEmpty(Environment.GetEnvironmentVariable("DOTNET_RUNNING_IN_CONTAINER")) &&
+		    string.IsNullOrEmpty(Environment.GetEnvironmentVariable("DOTNET_RUNNING_IN_CONTAINERS")))
+			builder.WebHost.UseUrls($"http://localhost:{port}");
+
 		_webApplication = builder.Build();
 		SetUpRoutes();
 	}