Update generate_config.sh

exit on error and pipefail
minor fix " ; then" to ";then"

generate_config.sh

@@ -1,5 +1,9 @@
 #!/bin/bash
 
++#exit on error and pipefail
++set -o errexit
++set -o pipefail
+
 if grep --help 2>&1 | head -n 1 | grep -q -i "busybox"; then
   echo "BusybBox grep detected, please install gnu grep, \"apk add --no-cache --upgrade grep\""
   exit 1