@BeforeClass
  public static void setUp() throws IOException, InterruptedException {
    localRegistry.pullAndPushToLocal("busybox", "busybox");
  }
A known oci manifest sha for gcr.io/distroless/base.
jib-core/src/integration-test/java/com/google/cloud/tools/jib/registry/ManifestPullerIntegrationTest.java