fixed connection string

Diligent.WebAPI.Data/Extensions/ServiceCollection.cs

                 secret = Environment.GetEnvironmentVariable("SECRET");
             }
             var connectionString = configuration.GetConnectionString(nameof(Diligent.WebAPI));
-            options.UseSqlServer(connectionString);
+            options.UseSqlServer(String.Concat(connectionString, secret));
         });
     }
 }