Automate welcoming new volunteers, adding to mailing list, etc.

[MichelleGlauser]

No description provided.

[MichelleGlauser]

Flow:

1. Person fills out volunteer form at http://bit.ly/volunteer-with-Techtonica
2. Check to see if they agreed to the Code of Conduct and volunteer release form, and if so, continue with the flow (otherwise, email them to let them know they need to do that).
3. Add their name, email address, location, and status as volunteer to the Mailchimp Supporters list.
4. Add their name and email address to the Eventbrite overall mailing list and the volunteer list.
5. Email them to thank them for signing up, to tell them about upcoming volunteering opportunities, and to share the link to join Slack.

Eventually, we'll also want each person to be added to a more robust CRM or at the very least a spreadsheet that has all the contacts (not just volunteers).