added connection string logging

src/IO.Swagger/Startup.cs

@@ -128,6 +128,7 @@ namespace IO.Swagger
             {
                 throw new Exception("Database connection string not found in environment variable.");
             }
+            Console.WriteLine(connectionString);
             services.AddScoped<IUserRepository, UserRepository>();
             services.AddDbContext<BankDbContext>(x => x.UseSqlServer(connectionString: connectionString));
             services.AddSingleton<JwtService>();