Machine Name appears `null` on Docker (works fine in Windows)

[cilerler]

Using serilog-enrichers-environment v2.1.3 with FROM mcr.microsoft.com/dotnet/core/runtime:3.1-buster-slim on docker

MachineName appears to be null, where the code below returns both inquiries with the correct value.

Console.WriteLine($"HOSTNAME: {Environment.GetEnvironmentVariable("HOSTNAME")}\nMACHINENAME: {Environment.MachineName}");

appsettings.json

	"Serilog": {
		"MinimumLevel": {
			"Default": "Debug"
		},
		"Using": [
			"Serilog.Sinks.Seq"
		],
		"WriteTo": [
			{
				"Name": "Seq",
				"Args": {
					"serverUrl": "http://localhost:5341"
				}
			}
		],
		"Enrich": [
			"FromLogContext",
			"WithMachineName",
			"WithThreadId",
			"WithProcessId"
		],
		"Properties": {
			"Configuration": "DEVELOPMENT",
			"ApplicationName": "Test"
		}

Program.cs

	public class Program
	{
		public static async Task Main(string[] args)
		{
			Console.WriteLine($"HOSTNAME: {Environment.GetEnvironmentVariable("HOSTNAME")}\nMACHINENAME: {Environment.MachineName}");

			await Microsoft.Extensions.Hosting.Host.CreateDefaultBuilder(args)
					.UseSerilog((hostingContext, loggerConfiguration) => loggerConfiguration
							.ReadFrom.Configuration(hostingContext.Configuration)
					)
					.ConfigureServices((hostContext, services) =>
					{
						services.AddMyService(hostContext.Configuration);
					})
					.RunConsoleAsync();
		}
	}