allow JS image failure to be debugged

refs DE-541

Change-Id: I2392649a7f1144dd0a17df85a619c27928055ca8
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/258574
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
QA-Review: Aaron Ogata <aogata@instructure.com>
Product-Review: Aaron Ogata <aogata@instructure.com>
Reviewed-by: Kyle Rosenbaum <krosenbaum@instructure.com>

Jenkinsfile

@@ -653,6 +653,17 @@ pipeline {
                   } catch(e) {
                     jsReady = false
 
+                    if(configuration.isChangeMerged()) {
+                      // DEBUG: Sometimes a node can get polluted and produce an error like
+                      // The git source https://github.com/rails-api/active_model_serializers.git is not yet checked out
+                      // Take the last successful layer and upload it so it can be debugged.
+
+                      sh """
+                        docker tag \$(docker images | awk '{print \$3}' | awk 'NR==2') $KARMA_RUNNER_IMAGE-failed
+                        ./build/new-jenkins/docker-with-flakey-network-protection.sh push $KARMA_RUNNER_IMAGE-failed
+                      """
+                    }
+
                     throw e
                   }
                 })

build/new-jenkins/js/docker-build.sh

@@ -38,7 +38,7 @@ fi
 
 tag_many $KARMA_BUILDER_SELECTED_TAG local/karma-builder ${KARMA_BUILDER_TAGS[SAVE_TAG]}
 
-DOCKER_BUILDKIT=1 docker build \
+docker build \
   --build-arg PATCHSET_TAG="$PATCHSET_TAG" \
   --build-arg RAILS_LOAD_ALL_LOCALES="$RAILS_LOAD_ALL_LOCALES" \
   --file Dockerfile.jenkins.karma-runner \