Add git server migration notes

Signed-off-by: Andy Doan <[email protected]>

index.md

@@ -3,6 +3,7 @@ they are worked on. You can also get real-time updates of service outages
 on our [Slack channel](https://join.slack.com/t/foundriesio/shared_invite/enQtNTc5NDkxNTI5NTExLWQ1Yjc3NDA2MjI3NzA3YzkxYjEzNzlhZjQ0M2QxYTIzYmIzZjlmOThmZGU0NTk5MWEwZGIwMTU2YWE4N2I5NWQ).
 
 ### Planned/Ongoing Events:
+ * [2024-08-16 Git server migration](2024-08-16-git-mv.md)
 
 ### Past Events:
  * [2024-08-02 Device Facing DNS updates](maintenance/2024-08-02-dns-change.md)

maintenance/2024-08-16-git-mv.md

@@ -0,0 +1,14 @@
+## Git Server Migration
+
+On Friday, 2024-08-16 at 18:00 UTC Foundries.io team will be migrating
+source.foundries.io to a different data center. This will produce a few
+minutes downtime while the changes propagate.
+
+## Approximate timeline of events
+* 13:00 - prep work - do complete sync of data to new server
+* **13:30** - current server will be changed to read-only mode (`git push` will be blocked)
+* 13:31 - delta-sync data from current server to new server again (will be much faster)
+* **13:35** - new service will be marked active and will accept read-write traffic
+
+There is no actual downtime planned. However, the service will run
+in a read-only mode a few minutes.