Add some information about the wiki setup

README.md

@@ -98,3 +98,24 @@ Using LVM such that we have:
 ```
 
 `opt` is mounted at `/opt`.
+
+## wiki.social.coop
+
+[wiki.social.coop](https://wiki.social.coop) has two main purposes:
+
+1. a public-facing site with information about social.coop
+2. the registration system for new users
+
+The code repo for the project is [tech/wiki.social.coop](https://git.coop/social.coop/tech/wiki.social.coop/) and the content comes from the [general wiki](https://git.coop/social.coop/general/-/wikis/home).
+
+It's configured/deployed via ansible using the [wiki.social.coop role](https://git.coop/social.coop/tech/ansible/-/tree/master/roles/wiki.social.coop) and the `wiki` tag, so `ansible-playbook server.playbook.yml --tags wiki` will set it up.
+
+The configuration secrets are stored in the [pass repo](https://git.coop/social.coop/tech/pass) at:
+```
+deployment/wiki/gitlab_token
+deployment/wiki/gitlab_username
+deployment/wiki/mailgun_password
+deployment/wiki/webhook_secret
+```
+
+On the server it lives at: `/opt/social.coop/wiki.social.coop/` and is running as the systemd service `wiki.social.coop.service`.