Update Ubuntu base Image and add release to version output

Dockerfile_base

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:20.04
 LABEL maintainer="tabledevil"
 LABEL docker.cmd="docker run -it --rm -v /mnt/sdc1:/data tabledevil/kaspersky"
 RUN apt update && apt install -y wget perl

start.sh

@@ -16,6 +16,7 @@ case "${1}" in
     echo "stage: ${1}"
     start_service
     kesl-control -S --app-info | grep -v '^$'
+    cat /etc/issue
     ;;
   scan )
     echo "stage: ${1}"