diff --git a/P/Sda1/Vaadin/Sudoku/README.md b/P/Sda1/Vaadin/Sudoku/README.md
index f9040a2b21990509abd7eef7a3f5babf00eb5df3..ae47a9037a157dfd5eb50cc26ac1883392217b70 100644
--- a/P/Sda1/Vaadin/Sudoku/README.md
+++ b/P/Sda1/Vaadin/Sudoku/README.md
@@ -36,3 +36,11 @@ next theme compilation or running the "mvn clean" target.
 When developing the theme, running the application in the "run" mode (rather than
 in "debug") in the IDE can speed up consecutive on-the-fly theme compilations
 significantly.
+
+Server side debugging
+---------------------
+See https://eclipse.org/jetty/documentation/current/debugging-with-eclipse.html
+
+Initial server startup
+----------------------
+"mvn install" creates widgetset prior to starting "mvn jetty:run"