feat(README): add

Author: DeviaVir

README.md

@@ -0,0 +1,20 @@
+# Status
+
+This repository is what sits behind <https://status.blockstream.com>!
+
+## Usage
+
+Issues with particular labels are what we use to control what is shown on the status page.
+There is a ~10 minute cache between updating an issue and it showing on the status page.
+
+### Components
+
+* label with `component` and `issue status`, and select a particular status:
+  * `operational`
+  * `degraded performance`
+  * `partial outage`
+  * `major outage`
+
+### Incidents
+
+* label with `incident` and `issue status`, and optionally `maintenance` if it is scheduled.