Update drone deployment script to only deploy when a tag is created (#313)

- Update drone deployment script to only deploy when a tag is created

#292

Co-authored-by: Ethan Lane <ethan@vylpes.com>
Reviewed-on: https://gitea.vylpes.xyz/RabbitLabs/vylbot-app/pulls/313

.drone.yml

@@ -16,10 +16,8 @@ steps:
       - sh /home/vylpes/scripts/vylbot/deploy_prod.sh
 
 trigger:
-  branch:
-  - main
   event:
-  - promote
+  - tag
 
 ---
 
@@ -71,4 +69,4 @@ trigger:
   - renovate/*
   event:
   - push
-  - pull_request
+  - pull_request