Experiment with setting up system test docker services

tests/WebApi.Tests.System/TokenResponse.cs

@@ -0,0 +1,9 @@
+using System.Text.Json.Serialization;
+
+namespace WebApi.Tests.System;
+
+public class TokenResponse
+{
+	[JsonPropertyName("access_token")]
+	public required string AccessToken { get; init; }
+}