Update '.drone.yml'

.drone.yml

@@ -43,6 +43,8 @@ steps:
     when:
       branch:
         - main
+      event:
+        - push
     settings:
       username: jackhadrill
       password:
@@ -53,6 +55,11 @@ steps:
 kind: pipeline
 type: docker
 name: build-docker-amd64
+trigger:
+  branch:
+    - main
+  event:
+    - push
 depends_on:
   - build-pypi
 platform:
@@ -60,9 +67,6 @@ platform:
 steps:
   - name: build
     image: plugins/docker
-    when:
-      branch:
-        - main
     settings:
       dockerfile: Dockerfile
       repo: git.jacknet.io/jackhadrill/container-spawner
@@ -75,6 +79,11 @@ steps:
 kind: pipeline
 type: docker
 name: build-docker-arm64
+trigger:
+  branch:
+    - main
+  event:
+    - push
 depends_on:
   - build-pypi
 platform:
@@ -82,9 +91,6 @@ platform:
 steps:
   - name: build
     image: plugins/docker
-    when:
-      branch:
-        - main
     settings:
       dockerfile: Dockerfile
       repo: git.jacknet.io/jackhadrill/container-spawner
@@ -97,6 +103,11 @@ steps:
 kind: pipeline
 type: docker
 name: combine-manifests
+trigger:
+  branch:
+    - main
+  event:
+    - push
 depends_on:
   - build-docker-amd64
   - build-docker-arm64