Update entrypoint.sh

entrypoint.sh

@@ -14,3 +14,9 @@ if [ -n "$GIT_CLONE_REPOS" ]; then
 else
   echo "No git repos requests detected."
 fi
+
+if [ -n "$ADDITIONAL_RUN" ]; then
+  $ADDITIONAL_RUN
+else
+  echo "Ready!"
+fi