Update drone to use promotions for prod

.drone.yml

@@ -30,9 +30,8 @@ steps:
         - git pull
         - yarn install
     when:
-      event:
-        - tag
-        - promote
+      event: promote
+      target: production
   - name: restart production services
     image: appleboy/drone-ssh
     settings:
@@ -48,9 +47,8 @@ steps:
         - systemctl restart coreid-www
         - systemctl restart coreid-jobs
     when:
-      event:
-        - tag
-        - promote
+      event: promote
+      target: production
   - name: send success notifications
     image: plugins/webhook
     settings: