chore: chain approve-image commands

so they continue only if the previous one succeeds

Author: Shesekino

scripts/approve-image.sh

@@ -9,8 +9,8 @@ else
   IMAGE_NAME_CANDIDATE=snyk/kubernetes-monitor:staging-candidate
   IMAGE_NAME_APPROVED=snyk/kubernetes-monitor:${1}-approved
 
-  docker pull ${IMAGE_NAME_CANDIDATE}
-  docker tag ${IMAGE_NAME_CANDIDATE} ${IMAGE_NAME_APPROVED}
-  docker push ${IMAGE_NAME_APPROVED}
+  docker pull ${IMAGE_NAME_CANDIDATE} &&
+  docker tag ${IMAGE_NAME_CANDIDATE} ${IMAGE_NAME_APPROVED} &&
+  docker push ${IMAGE_NAME_APPROVED} &&
   ./scripts/slack-notify-push.sh ${IMAGE_NAME_APPROVED}
 fi