added helpful readme to container

Dockerfile

@@ -6,6 +6,7 @@ RUN wget "https://products.s.kaspersky-labs.com/endpoints/keslinux10/10.1.1.6421
 ADD answer.txt /root/answer.txt
 RUN /opt/kaspersky/kesl/bin/kesl-setup.pl --autoinstall=/root/answer.txt ; true
 ADD start.sh /root/start.sh
+add readme /root/readme
 RUN chmod +x /root/start.sh
 ENTRYPOINT ["/root/start.sh"]
 CMD ["shell"]

start.sh

@@ -9,7 +9,7 @@ case "${1}" in
     echo "stage: ${1}"
     start_service
     echo "Usage:"
-    echo "kesl-control --scan-file <path>"
+    cat /root/readme
     /bin/bash
     ;;
   version )
@@ -27,6 +27,8 @@ case "${1}" in
     ;;
   debug )
     echo "stage: ${1}"
+    echo "Usage:"
+    cat /root/readme
     /bin/bash
     ;;
 esac