Ao fazer build - erro

Ao fazer o build, executando na prática o que foi pedido por instrutor, apresentou erro:

[jenkins-todo-list-principal] $ /bin/sh -xe /tmp/jenkins2811396119502242782.sh

• docker run --rm -i hadolint/hadolint Docker Build Docker Build: building image at path /var/lib/jenkins/workspace/jenkins-todo-list-principal Step 1/7 : FROM python:3.6

ERROR: Build step failed with exception
com.github.dockerjava.api.exception.DockerClientException: Could not build image: Get https://registry-1.docker.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
    at com.github.dockerjava.core.command.BuildImageResultCallback.getImageId(BuildImageResultCallback.java:79)
    at com.github.dockerjava.core.command.BuildImageResultCallback.awaitImageId(BuildImageResultCallback.java:51)
    at com.nirima.jenkins.plugins.docker.builder.DockerBuilderPublisher$Run.buildImage(DockerBuilderPublisher.java:377)
    at com.nirima.jenkins.plugins.docker.builder.DockerBuilderPublisher$Run.run(DockerBuilderPublisher.java:303)
    at com.nirima.jenkins.plugins.docker.builder.DockerBuilderPublisher.perform(DockerBuilderPublisher.java:453)
    at hudson.tasks.BuildStepCompatibilityLayer.perform(BuildStepCompatibilityLayer.java:78)
    at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
    at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:741)
    at hudson.model.Build$BuildExecution.build(Build.java:206)
    at hudson.model.Build$BuildExecution.doRun(Build.java:163)
    at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:504)
    at hudson.model.Run.execute(Run.java:1853)
    at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
    at hudson.model.ResourceController.execute(ResourceController.java:97)
    at hudson.model.Executor.run(Executor.java:427)
Build step 'Build / Publish Docker Image' marked build as failure
Finished: FAILURE

Como proceder? consigo continuar sem ter o programa criado?