send_slack_message.sh

#!/bin/bash
# SLACK_WEBHOOK=$(printenv YOUR_SLACK_WEBHOOK)
SLACK_WEBHOOK="<INSERT_YOUR_SLACK_WEBHOOK>"
f_send_slack() {
    SLACK_TEXT="$@"
    SLACK_JSON="""payload={
        \"channel\":    \"#general\",
        \"username\":   \"your-slack-bot\",
        \"icon_emoji\": \":monkey_face:\",
        \"text\":       \"${SLACK_TEXT}\"
    }"""
    curl -s -X POST \
    --data-urlencode "${SLACK_JSON}" \
    $SLACK_WEBHOOK > /dev/null
}
# f_send_slack "Your messages"
f_send_slack "$@"