Add backend structure with Docker support and initial configuration files

Signed-off-by: Dmitrii <computer@yawaflua.tech>

Took 4 hours 25 minutes

backend/SpMega.Backend/Persistent/Models/DTO/MojangDTO.cs

@@ -0,0 +1,15 @@
+namespace SpMega.Backend.Persistent.Models.DTO;
+
+public class PropertyDto
+{
+    public string Name { get; set; }
+    public string Value { get; set; }
+    public string Signature { get; set; }
+}
+
+public class MojangDto
+{
+    public string Id { get; set; }
+    public string Name { get; set; }
+    public List<PropertyDto> Properties { get; set; }
+}

backend/SpMega.Backend/Persistent/Models/DTO/UserAccountDTO.cs

@@ -0,0 +1,15 @@
+using SPWorldsApi.Types.Interfaces;
+
+namespace SpMega.Backend.Persistent.Models.DTO;
+
+public class UserAccountDTO : IUserAccount
+{
+    public string id { get; set; }
+    public string username { get; set; }
+    public string minecraftUUID { get; set; }
+    public string status { get; set; }
+    public List<string> roles { get; set; }
+    public ICity city { get; set; }
+    public List<IUserCard> cards { get; set; }
+    public DateTime createdAt { get; set; }
+}