customized Graal CE Dockerfile for Truffle experiments

CustomGraalCEDockerfile

FROM oracle/graalvm-ce
WORKDIR /truffle-sandbox
RUN yum-config-manager --save --setopt=ol7_developer_EPEL.skip_if_unavailable=true && \
    yum install -y iputils && \
    yum install -y iproute && \
    yum install -y xeyes && \
    yum install -y git && \
    yum install -y maven && \
    yum install -y vim && \
    gu install native-image && \
    git clone -c http.sslVerify=false https://github.com/graalvm/simplelanguage.git && \
    mvn -f /truffle-sandbox/simplelanguage/pom.xml clean
CMD ["/bin/bash"]