Docker builds tomcat

The contents of the Dockerfile are as follows:

#Based on centos:6 image
FROM centos:6
#information
MAINTAINER hxguang <[email protected]>

#Install ssh-server ,vim
RUN yum install -y openssh-server vim

#Add java and tomcat to the container
ADD jdk1.7.0_80 /usr/local/jdk1.7.0_80
ADD apache-tomcat-7.0.73 /usr/local/tomcat


#Configure java and tomcat environment variables
ENV JAVA_HOME /usr/local/jdk1.7.0_80
ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
ENV PATH $PATH:$JAVA_HOME/bin
# expose the port
EXPOSE 22 8080

#Start tomcat
ENTRYPOINT /usr/local/tomcat/bin/startup.sh && tail -F /usr/local/tomcat/logs/catalina.out