Merge pull request #181 from icyblazek/master

xxl-job-admin add Dockerfile

xxl-job-admin/Dockerfile

+FROM tomcat:latest
+MAINTAINER "icyblazek@gamil.com"
+ADD target/xxl-job-admin-1.8.2-SNAPSHOT.war /usr/local/tomcat/webapps/xxl-job-admin.war
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