WIP: prepare a docker image for cepcsw.

Dockerfile

+##############################################################################
+# Docker image for CEPCSW
+##############################################################################
+
+# # Instruction
+# To build the docker image:
+#   $ docker build -t cepc/cepcsw .
+# Or with CVMFS installed also
+#   $ docker build -t cepc/cepcsw-cvmfs . --build-args CVMFSMOD=INSIDE
+
+FROM centos:7
+
+ARG CVMFSMOD
+
+# Basic
+RUN yum install -y sudo
+RUN sudo yum install -y redhat-lsb wget
+
+# Install singularity
+RUN sudo yum update -y && \
+    sudo yum install -y epel-release && \
+    sudo yum update -y && \
+    sudo yum install -y singularity
+
+# Install CVMFS
+# Configure IHEP
+# Enable /cvmfs/cepcsw.ihep.ac.cn and /cvmfs/container.ihep.ac.cn
+
+RUN if [ "$CVMFSMOD" = "INSIDE" ]; then \
+  sudo yum install -y https://ecsft.cern.ch/dist/cvmfs/cvmfs-release/cvmfs-release-latest.noarch.rpm \
+  && sudo yum install -y cvmfs \
+  && sudo mkdir /etc/cvmfs/keys/ihep.ac.cn \
+  && sudo curl -o /etc/cvmfs/keys/ihep.ac.cn/ihep.ac.cn.pub http://cvmfs-stratum-one.ihep.ac.cn/cvmfs/software/client_configure/ihep.ac.cn/ihep.ac.cn.pub \
+  && sudo curl -o /etc/cvmfs/domain.d/ihep.ac.cn.conf http://cvmfs-stratum-one.ihep.ac.cn/cvmfs/software/client_configure/ihep.ac.cn.conf \
+  && echo "CVMFS_REPOSITORIES='sft.cern.ch,cepcsw.ihep.ac.cn,container.ihep.ac.cn'" | sudo tee    /etc/cvmfs/default.local \
+  && echo "CVMFS_HTTP_PROXY=DIRECT"                                                 | sudo tee -a /etc/cvmfs/default.local \
+  && cat /etc/cvmfs/default.local \
+  && sudo mkdir -p /cvmfs/sft.cern.ch \
+  && sudo mkdir -p /cvmfs/cepcsw.ihep.ac.cn \
+  && sudo mkdir -p /cvmfs/container.ihep.ac.cn; \
+  fi
+
+# START Container:
+# # docker run  --privileged  --rm -i -t IMAGE /bin/bash
+# Due to the fuse issue, following commands need to be run inside container when --privileged is specified
+# $ mount -t sft.cern.ch /cvmfs/sft.cern.ch
+# $ mount -t cvmfs container.ihep.ac.cn /cvmfs/container.ihep.ac.cn
+# $ mount -t cvmfs cepcsw.ihep.ac.cn /cvmfs/cepcsw.ihep.ac.cn
+