Joey Orlando 9be8080e51 add the ability to set/display "currently undergoing maintenance message" in the UI (#1917) ... # What this PR does add a new endpoint, `GET /maintenance-mode/`, which returns either a string message pulled from the `CURRENTLY_UNDERGOING_MAINTENANCE_MESSAGE` env var, or `None` + update the UI to conditionally show this message if it is set <img width="1321" alt="Screenshot 2023-05-10 at 11 28 16" src="https://github.com/grafana/oncall/assets/9406895/833a77fb-3a90-4f9f-88d6-dae0d98d99d4"> ## Checklist - [x] Unit, integration, and e2e (if applicable) tests updated - [x] Documentation added (or `pr:no public docs` PR label added if not required) (N/A) - [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not required)		2023-05-12 15:44:09 +00:00
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test_maintenance_mode.py	add the ability to set/display "currently undergoing maintenance message" in the UI (#1917)	2023-05-12 15:44:09 +00:00