Updated README and added another optional task.

src/main/java/workshop/Controller.java

@@ -10,8 +10,10 @@ public class Controller {
 
     private boolean isDark = true;
 
-    // TODO: (Optional) Create initialize function and use it to set prices during runtime.
+    // TODO: (Optional:For Practice) Create initialize function and use it to set prices during runtime.
 
+
+    // TODO: (Optional:For Practice) Make the plan price go 1 dollar up each time user clicks on the shop button.
     @FXML
     private void buyBasic() {
         // TODO: Call showAlert() with a message indicating the user entered the payment gateway