fixed a bug

client/Reader/MainForm.cs

@@ -13,11 +13,14 @@ namespace Reader
     public partial class MainForm : Form
     {
         private static readonly HttpClient http = new HttpClient();
-        private static readonly string ServerUrl = System.IO.File.ReadAllText("appsettings.json")
-            .Replace("\"", "")
-            .Split(':')[1]
-            .Replace("/", "")
-            .Trim();
+        private static readonly string ServerUrl;
+
+        static MainForm()
+        {
+            var configPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "appsettings.json");
+            var jsonContent = System.IO.File.ReadAllText(configPath);
+            ServerUrl = jsonContent.Replace("\"", "").Split(':')[1].Replace("/", "").Trim();
+        }
 
         public MainForm()
         {

client/Reader/Reader.csproj

@@ -6,4 +6,9 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
+  <ItemGroup>
+    <None Include="appsettings.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
 </Project>