Add RocketChat notifications for failed builds

.drone.yml

@@ -26,6 +26,18 @@ steps:
         from_secret: codecov_token
         required: true
 
+  - name: notify rocket chat
+    image: plugins/slack
+    settings:
+      webhook:
+        from_secret: rc_builds_url
+      username: comradebritney
+      channel: "internal.builds"
+      template: "{{repo.owner}}/{{repo.name}} build failed: {{build.link}}"
+    when:
+      status:
+        - failure
+
 trigger:
   branch:
     - main