PredictionIO通用推荐引擎

我拉了“zephrax / docker-prediction.io-universal-recommender” docker镜像，并按照https://github.com/PredictionIO/template-scala-parallel-universal-recommendation中的说明进行操作，当我执行pio build it pio build在这一行，而不是：

 root@0016c0672bc4:/universal-recommender-0.6.0# pio build --verbose SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/PredictionIO-0.11.0- incubating/lib/spark/pio-data-hdfs-assembly-0.11.0- incubating.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/PredictionIO-0.11.0- incubating/lib/pio-assembly-0.11.0- incubating.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory] [INFO] [Engine$] Using command '/PredictionIO-0.11.0- incubating/sbt/sbt' at /universal-recommender-0.6.0 to build. [INFO] [Engine$] If the path above is incorrect, this process will fail. [INFO] [Engine$] Uber JAR disabled, but current working directory does not look like an engine project directory. Please delete lib/pio- assembly-0.11.0-incubating.jar manually. [INFO] [Engine$] Going to run: /PredictionIO-0.11.0-incubating/sbt/sbt package assemblyPackageDependency in /universal-recommender-0.6.0 [INFO] [Engine$] [info] Loading project definition from /universal- recommender-0.6.0/project [INFO] [Engine$] [info] Updating {file:/universal-recommender- 0.6.0/project/}universal-recommender-0-6-0-build... [INFO] [Engine$] [info] Resolving org.scalariform#sbt- scalariform;1.6.0 ... [info] Resolving org.scalariform#sbt-scalariform;1.6.0 ... 

问题是什么 ？ 我怎样才能find这个docker图像的日志？ 谢谢