Enable bash debug mode when debug is true (#460)

* Set -x when debug mode true

* Update description of debug parameter

src/commands/notify.yml

@@ -63,6 +63,7 @@ parameters:
       default: true
   debug:
       description: |
+       Runs scripts in debug mode for bash.
        Enable to view full payload being sent to Slack and response being received from the API call.
        Redacted content can be viewed by re-running the job with SSH and accessing the log files referenced in the job output.
        When run in a persistent build environment such as CircleCI Runner, these debug log files may remain in the system's temporary filesystem indefinitely and accumulate over time.

src/jobs/on-hold.yml

@@ -42,6 +42,7 @@ parameters:
       default: $SLACK_DEFAULT_CHANNEL
   debug:
       description: |
+       Runs scripts in debug mode for bash.
        View payload and response being sent to slack api.
        Enable to view full payload being sent to slack and response being received from the API call.
       type: boolean

src/scripts/notify.sh

@@ -1,6 +1,10 @@
 #!/usr/bin/env bash
 # shellcheck disable=SC2016,SC3043
 
+if [ "$SLACK_PARAM_DEBUG" -eq 1 ]; then
+    set -x
+fi
+
 # Import utils.
 eval "$SLACK_SCRIPT_UTILS"
 JQ_PATH=/usr/local/bin/jq
@@ -298,3 +302,4 @@ if [ "${0#*"$ORB_TEST_ENV"}" = "$0" ]; then
     BuildMessageBody
     PostToSlack
 fi
+set +x