Creating server daemon. Added system info (not host info) and data usage endpoints

MoonlightServers.Daemon/Http/Controllers/Sys/SystemDataUsageController.cs

@@ -0,0 +1,33 @@
+using Microsoft.AspNetCore.Mvc;
+using MoonlightServers.Daemon.Services;
+using MoonlightServers.DaemonShared.Http.Responses.Sys;
+
+namespace MoonlightServers.Daemon.Http.Controllers.Sys;
+
+[ApiController]
+[Route("api/system/dataUsage")]
+public class SystemDataUsageController : Controller
+{
+    private readonly DockerInfoService DockerInfoService;
+
+    public SystemDataUsageController(DockerInfoService dockerInfoService)
+    {
+        DockerInfoService = dockerInfoService;
+    }
+
+    [HttpGet]
+    public async Task<SystemDataUsageResponse> Get()
+    {
+        var report = await DockerInfoService.GetDataUsage();
+
+        return new SystemDataUsageResponse()
+        {
+            ImagesReclaimable = report.Images.Reclaimable,
+            ImagesUsed = report.Images.Used,
+            ContainersReclaimable = report.Containers.Reclaimable,
+            ContainersUsed = report.Containers.Used,
+            BuildCacheReclaimable = report.BuildCache.Reclaimable,
+            BuildCacheUsed = report.BuildCache.Used
+        };
+    }
+}