using kaniko task from tectoncd catalog

apps/rompr/tekton-image-build.yaml

@@ -41,8 +41,12 @@ spec:
     outputs:
       - name: builtImage
         type: image
+  results:
+  - name: IMAGE-DIGEST
+    description: Digest of the image just built.
+  
   steps:
-    - name: build-and-push-arm64
+    - name: build-and-push
       image: gcr.io/kaniko-project/executor:latest
       command:
         - /kaniko/executor
@@ -52,17 +56,7 @@ spec:
         - --context=$(params.pathToContext)
         - --snapshotMode=redo
         - --skip-tls-verify
-    - name: build-and-push-armhf
-      image: gcr.io/kaniko-project/executor:latest
-      command:
-        - /kaniko/executor
-      args:
-        - --build-arg="GOARCH=arm"
-        - --dockerfile=$(params.pathToDockerFile)
-        - --destination=$(resources.outputs.builtImage.url)
-        - --context=$(params.pathToContext)
-        - --snapshotMode=redo
-        - --skip-tls-verify
+        - --digest-file=/tekton/results/IMAGE-DIGEST
 ---
 apiVersion: tekton.dev/v1beta1
 kind: TaskRun