Volunteers need a place to call “home” on the web. You should build them a specific, branded location that provides them all the information they need to be part of your community. Most likely, this will be a website. We use an accessible Wordpress webste, but you can use any medium that you are familiar with.
What are some considerations for your developer zone?
Branded specifically for the volunteer effort of your organization
Clear instructions in how to get started
Links to GitHub Issues
Code of Conduct / Terms of Service
Links to the various departments and specific projects that you would like the developers to work on
Consider and introduction powerpoint or video
Your contact information
Knowledge area of tools and stacks your organization uses