Update entrypoint.sh (#94)

Echo actual `NEW_USER_ID`, instead of hardcoded/default id=9001.

2.0.0/amd64/entrypoint.sh

@@ -8,7 +8,7 @@ IFS=$'\n\t'
 NEW_USER_ID=${USER_ID:-9001}
 echo "Starting with openhab user id: $NEW_USER_ID"
 if ! id -u openhab >/dev/null 2>&1; then
-  echo "Create user openhab with id 9001"
+  echo "Create user openhab with id ${NEW_USER_ID}"
   adduser -u $NEW_USER_ID --disabled-password --gecos '' --home ${APPDIR} openhab &&\
     groupadd -g 14 uucp2 &&\
     groupadd -g 16 dialout2 &&\