Dockerfile

FROM ubuntu

# Update Ubuntu
RUN apt-get update && apt-get -y upgrade

# Add oracle java 7 repository
RUN apt-get -y install software-properties-common
RUN add-apt-repository ppa:webupd8team/java
RUN apt-get -y update

# Accept the Oracle Java license
RUN echo "oracle-java7-installer shared/accepted-oracle-license-v1-1 boolean true" | debconf-set-selections

# Install Oracle Java
RUN apt-get -y install oracle-java7-installer

# Install tomcat
RUN apt-get -y install tomcat7
RUN echo "JAVA_HOME=/usr/lib/jvm/java-7-oracle" >> /etc/default/tomcat7
ADD TestA_Layne.war /usr/share/tomcat7-root

EXPOSE 8080

# Start Tomcat, after starting Tomcat the container will stop. So use a 'trick' to keep it running.
CMD service tomcat7 start && tail -f /var/lib/tomcat7/logs/catalina.out