Implemented db entities. Adjusted template default values

MoonlightServers.ApiServer/Database/Entities/ServerBackup.cs

@@ -0,0 +1,13 @@
+namespace MoonlightServers.ApiServer.Database.Entities;
+
+public class ServerBackup
+{
+    public int Id { get; set; }
+
+    public DateTime CreatedAt { get; set; }
+    public DateTime CompletedAt { get; set; }
+
+    public long Size { get; set; }
+    public bool Successful { get; set; }
+    public bool Completed { get; set; }
+}