Re-implemented server state machine. Cleaned up code

TODO: Handle trigger errors

MoonlightServers.Daemon/Services/DockerImageService.cs

@@ -0,0 +1,40 @@
+using Docker.DotNet;
+using Docker.DotNet.Models;
+using MoonCore.Attributes;
+
+namespace MoonlightServers.Daemon.Services;
+
+[Singleton]
+public class DockerImageService
+{
+    private readonly DockerClient DockerClient;
+    private readonly ILogger<DockerImageService> Logger;
+
+    public DockerImageService(DockerClient dockerClient, ILogger<DockerImageService> logger)
+    {
+        DockerClient = dockerClient;
+        Logger = logger;
+    }
+
+    public async Task Ensure(string name, Action<string>? onProgressUpdated)
+    {
+        await DockerClient.Images.CreateImageAsync(new()
+            {
+                FromImage = name
+            },
+            new AuthConfig(), // TODO: Config for custom registries
+            new Progress<JSONMessage>(async message =>
+            {
+                if (message.Progress == null)
+                    return;
+
+                var line = $"[{message.ID}] {message.ProgressMessage}";
+                
+                Logger.LogInformation("{line}", line);
+                
+                if(onProgressUpdated != null)
+                    onProgressUpdated.Invoke(line);
+            })
+        );
+    }
+}