I'm unable to push a docker image to the heroku registry.

I'm successfully logged in according to docker:

```
❯ docker login registry.heroku.com
Authenticating with existing credentials...
Login Succeeded

```

After that I run `mvn jib:build` and I get some confusing error saying I'm trying to push to an unsecure repo while the url in de output looks secure ( starts with https ).
What am I doing wrong ?

I'm using the following jib config:

```
  <plugin>
            <groupId>com.google.cloud.tools</groupId>
            <artifactId>jib-maven-plugin</artifactId>
            <version>2.5.2</version>
            <configuration>
                <to>
                    <image>registry.heroku.com/my-app</image>
                </to>
            </configuration>
  </plugin>

```

Maven output of jib:build wiht -X:

```
    Caused by: org.apache.maven.plugin.MojoExecutionException: Build image failed, perhaps you should use a registry that supports HTTPS or set the configuration parameter 'allowInsecureRegistries'
    at com.google.cloud.tools.jib.maven.BuildImageMojo.execute (BuildImageMojo.java:169)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.apache.maven.wrapper.BootstrapMainStarter.start (BootstrapMainStarter.java:39)
    at org.apache.maven.wrapper.WrapperExecutor.execute (WrapperExecutor.java:122)
    at org.apache.maven.wrapper.MavenWrapperMain.main (MavenWrapperMain.java:61)
Caused by: com.google.cloud.tools.jib.api.InsecureRegistryException: Failed to verify the server at https://registry.heroku.com/v2/myapp/blobs/sha256:0fe85c64a011626a777c0662f83b2d819954d4148d96ca5fc626bf99f7c3644d because only secure connections are allowed.
    at com.google.cloud.tools.jib.registry.RegistryEndpointCaller.call (RegistryEndpointCaller.java:180)
    at com.google.cloud.tools.jib.registry.RegistryEndpointCaller.call (RegistryEndpointCaller.java:115)
    at com.google.cloud.tools.jib.registry.RegistryClient.callRegistryEndpoint (RegistryClient.java:592)
    at com.google.cloud.tools.jib.registry.RegistryClient.checkBlob (RegistryClient.java:444)
    at com.google.cloud.tools.jib.builder.steps.ObtainBaseImageLayerStep.lambda$makeListForSelectiveDownload$1 (ObtainBaseImageLayerStep.java:74)
    at com.google.cloud.tools.jib.builder.steps.ObtainBaseImageLayerStep.call (ObtainBaseImageLayerStep.java:142)
    at com.google.cloud.tools.jib.builder.steps.ObtainBaseImageLayerStep.call (ObtainBaseImageLayerStep.java:43)
    at com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly (TrustedListenableFutureTask.java:125)
    at com.google.common.util.concurrent.InterruptibleTask.run (InterruptibleTask.java:69)
    at com.google.common.util.concurrent.TrustedListenableFutureTask.run (TrustedListenableFutureTask.java:78)
    at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1128)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:628)
    at java.lang.Thread.run (Thread.java:834)
Caused by: javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated
    at sun.security.ssl.SSLSessionImpl.getPeerCertificates (SSLSessionImpl.java:526)
    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.verifyHostname (SSLConnectionSocketFactory.java:504)
    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket (SSLConnectionSocketFactory.java:437)
    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket (SSLConnectionSocketFactory.java:384)
    at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect (DefaultHttpClientConnectionOperator.java:142)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect (PoolingHttpClientConnectionManager.java:374)
    at org.apache.http.impl.execchain.MainClientExec.establishRoute (MainClientExec.java:393)
    at org.apache.http.impl.execchain.MainClientExec.execute (MainClientExec.java:236)
    at org.apache.http.impl.execchain.ProtocolExec.execute (ProtocolExec.java:186)
    at org.apache.http.impl.client.InternalHttpClient.doExecute (InternalHttpClient.java:185)
    at org.apache.http.impl.client.CloseableHttpClient.execute (CloseableHttpClient.java:83)
    at org.apache.http.impl.client.CloseableHttpClient.execute (CloseableHttpClient.java:108)
    at org.apache.http.impl.client.CloseableHttpClient.execute (CloseableHttpClient.java:56)
    at com.google.api.client.http.apache.v2.ApacheHttpRequest.execute (ApacheHttpRequest.java:73)
    at com.google.api.client.http.HttpRequest.execute (HttpRequest.java:1012)
    at com.google.cloud.tools.jib.http.FailoverHttpClient.call (FailoverHttpClient.java:323)
    at com.google.cloud.tools.jib.http.FailoverHttpClient.call (FailoverHttpClient.java:250)
    at com.google.cloud.tools.jib.registry.RegistryEndpointCaller.call (RegistryEndpointCaller.java:139)
    at com.google.cloud.tools.jib.registry.RegistryEndpointCaller.call (RegistryEndpointCaller.java:115)
    at com.google.cloud.tools.jib.registry.RegistryClient.callRegistryEndpoint (RegistryClient.java:592)
    at com.google.cloud.tools.jib.registry.RegistryClient.checkBlob (RegistryClient.java:444)
    at com.google.cloud.tools.jib.builder.steps.ObtainBaseImageLayerStep.lambda$makeListForSelectiveDownload$1 (ObtainBaseImageLayerStep.java:74)
    at com.google.cloud.tools.jib.builder.steps.ObtainBaseImageLayerStep.call (ObtainBaseImageLayerStep.java:142)
    at com.google.cloud.tools.jib.builder.steps.ObtainBaseImageLayerStep.call (ObtainBaseImageLayerStep.java:43)
    at com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly (TrustedListenableFutureTask.java:125)
    at com.google.common.util.concurrent.InterruptibleTask.run (InterruptibleTask.java:69)
    at com.google.common.util.concurrent.TrustedListenableFutureTask.run (TrustedListenableFutureTask.java:78)
    at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1128)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:628)
    at java.lang.Thread.run (Thread.java:834)

```