on tag event

.drone/.drone.jsonnet

@@ -11,10 +11,13 @@
       {
         name: 'step',
         image: 'alpine',
+        trigger: {
+          event: ['tag'],
+        },
         commands: [
           'echo hello',
           'echo $${DRONE_COMMIT}',
-          'echo $${DRONE_TAG}}',
+          'echo $${DRONE_TAG}',
         ],
       },
 

.drone/.drone.yml

@@ -13,6 +13,6 @@ steps:
   commands:
   - echo hello
   - echo $${DRONE_COMMIT}
-  - echo $${DRONE_TAG}}
+  - echo $${DRONE_TAG}
 
 ...