schutzbot: don't print the slack webhook url

Author: ondrejbudai

schutzbot/slack_notification.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -eux
+set -eu
 
 if [ -z "${SLACK_WEBHOOK_URL:-}" ]; then
     echo "INFO: Variable SLACK_WEBHOOK_URL is undefined"
@@ -23,6 +23,8 @@ else
     fi
 fi
 
+echo "INFO: Sending slack notification: $MESSAGE"
+
 curl \
     -X POST \
     -H 'Content-type: application/json' \