Trying to build direct from Dockerfile locally gives PluginResolutionException

[samthebest]

Thank you for your awesome containerisation of zeppelin - easiest way to run for sure.

So I'd like to tweak your Dockerfile to do some stuff slightly different, but when I clone and try to build the container locally I get the following. Have you seen this before? I'm not behind a proxy so this should work. Is this a docker networking issue? Or the Zeppelin build is indeed dodgy?

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.5:war (default-war) on project zeppelin-web: Execution default-war of goal org.apache.maven.plugins:maven-war-plugin:2.5:war failed: Plugin org.apache.maven.plugins:maven-war-plugin:2.5 or one of its dependencies could not be resolved: Failed to collect dependencies at org.apache.maven.plugins:maven-war-plugin:jar:2.5 -> org.codehaus.plexus:plexus-io:jar:2.1.3: Failed to read artifact descriptor for org.codehaus.plexus:plexus-io:jar:2.1.3: Could not transfer artifact org.codehaus.plexus:plexus-io:pom:2.1.3 from/to central (https://repo.maven.apache.org/maven2): repo.maven.apache.org:443 failed to respond -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginResolutionException
[ERROR] 
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :zeppelin-web