Add promote event trigger in .drone.yml

.drone.yml

@@ -74,7 +74,7 @@ steps:
 
 trigger:
   branch: release/*
-  event: tag
+  event: [ tag, promote ]
   ref: refs/tags/* # only trigger when tagging
 
 ---
@@ -133,7 +133,6 @@ steps:
       mount:
         - frontend/node_modules
       when:
-        event: push
         status: [ success, failure ]
 
   - name: Flush cache
@@ -150,12 +149,10 @@ steps:
       debug: true
       filename: frontend-dev.tar
       when:
-        status:
-        - success
-        - failure
+        status: [ success, failure ]
 
 trigger:
-  event: [ push, pull_request ]
+  event: [ push, pull_request, promote ]
   branch: [ master, feature/* ]
 
 ---
@@ -220,7 +217,6 @@ steps:
       mount:
         - backend/node_modules
       when:
-        event: push
         status: [ success, failure ]
 
   - name: Flush cache
@@ -241,7 +237,7 @@ steps:
 
 trigger:
   branch: release/*
-  event: tag
+  event: [ tag, promote ]
   ref: refs/tags/* # only trigger when tagging
 
 ---
@@ -305,7 +301,6 @@ steps:
       mount:
         - backend/node_modules
       when:
-        event: push
         status: [ success, failure ]
 
   - name: Flush cache
@@ -325,5 +320,5 @@ steps:
         status: [ success, failure ]  
 
 trigger:
-  event: [ push, pull_request ]
+  event: [ push, pull_request, promote ]
   branch: [ master, feature/* ]