Create documentation for monthly mentoring team meetings on Slack

Problem/Motivation

Mentoring team meetings take place at 20:00UTC on the second Wednesday each month.

We should document the process of planning and hosting the meetings.

Steps to reproduce

Proposed resolution

Create a document for meeting hosts to follow.

Remaining tasks

• Create draft document
• Mentors to review
• Migrate to document page

User interface changes

API changes

Data model changes