welcome.json

{
    "attachments": [{
        "mrkdwn_in": ["text"],
        "author_name": "Learn How to Use Emoji Reactions",
        "author_link": "https://get.slack.help/hc/en-us/articles/206870317-Emoji-reactions",
        "text": ":white_large_square: *Add an emoji reaction to this message* :thinking_face:",
        "fields": [{
            "value": "You can quickly respond to any message on Slack with an emoji reaction. Reactions can be used for any purpose: voting, checking off to-do items, showing excitement."
        }]
    }, {
        "mrkdwn_in": ["text"],
        "author_name": "Learn How to Pin a Message",
        "author_link": "https://get.slack.help/hc/en-us/articles/205239997-Pinning-messages-and-files",
        "text": ":white_large_square: *Pin this message* :round_pushpin:",
        "fields": [{
            "value": "Important messages and files can be pinned to the details pane in any channel or direct message, including group messages, for easy reference."
        }]
    }, {
        "mrkdwn_in": ["text"],
        "author_name": "Learn How to Share a Message in Slack",
        "author_link": "https://get.slack.help/hc/en-us/articles/203274767-Share-messages-in-Slack",
        "text": ":white_large_square: *Share this Message* :mailbox_with_mail:",
        "fields": [{
            "value": "Sharing messages in Slack can help keep conversations on your team organized. And, it's easy to do!"
        }]
    }]
}