Add release logic CI setup

.drone.yml

@@ -0,0 +1,13 @@
+---
+kind: pipeline
+name: recipe release
+steps:
+  - name: release a new version
+    image: decentral1se/drone-abra:latest
+    settings:
+      command: recipe matrix-synapse release
+      deploy_key:
+        from_secret: abra_bot_deploy_key
+trigger:
+  event:
+    - tag

README.md

@@ -1,5 +1,7 @@
 # Matrix (Synapse)
 
+[![Build Status](https://drone.autonomic.zone/api/badges/coop-cloud/matrix-synapse/status.svg?ref=refs/heads/main)](https://drone.autonomic.zone/coop-cloud/matrix-synapse)
+
 <!-- metadata -->
 * **Category**: Apps
 * **Status**: ❹💣