INIT vol 1.

src/WorkFlowCheck.BL/DTO/ResponseDTO.cs

@@ -0,0 +1,10 @@
+using System.Text.Json.Serialization;
+
+namespace WorkFlowCheck.BL.DTO
+{
+    [JsonSerializable(typeof(ResponseDTO))]
+    public class ResponseDTO
+    {
+        public string Message { get; set; } = null!;
+    }
+}

src/WorkFlowCheck.BL/WorkFlowCheck.BL.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>