Merge branch 'doc-webhook' into 'master'

Document how wiki content updates propagate

See merge request social.coop/tech/wiki.social.coop!5

README.md

@@ -3,8 +3,7 @@
 ## Overview
 
 - Our wiki is hosted at https://wiki.social.coop
-- The content for the wiki comes from the [social.coop/general
-  wiki](https://git.coop/social.coop/general/-/wikis/home) here on git.coop (in
+- The content for the wiki comes from the [social.coop/general wiki] here on git.coop (in
   order to be easily editable by all)
 - This repo uses the [metalsmith](https://github.com/segmentio/metalsmith)
   static site generator to build the markdown into html
@@ -12,6 +11,7 @@
 ## Content
 
 - wiki is a git repo under the hood (it gets cloned into src/)
+- All commits to [social.coop/general wiki] trigger a webhook call to the wiki.social.coop server, which then performs a `git pull` to fetch the latest content.
 - wiki also holds some templates (like gitlab issue and email) **which aren't
   visible through the gitlab wiki interface**, so you need to clone the repo to
   edit them
@@ -38,3 +38,5 @@
 - the secret values in config.js are templated in config.js.j2 and mapped in
   [server.playbook.yaml](https://git.coop/social.coop/tech/ansible/-/blob/master/server.playbook.yml)
   to secrets encypted in [our pass repo](https://git.coop/social.coop/tech/pass)
+
+[social.coop/general wiki]: https://git.coop/social.coop/general/-/wikis/home