Added Dockerfile to containerize elektron.

Dockerfile

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+# Copyright (C) 2018 spdf
+#
+# This file is part of Elektron.
+#
+# Elektron is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Elektron is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Elektron.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+FROM ubuntu:xenial
+
+RUN apt-get update && apt-get -y install \
+    apt-transport-https \
+    ca-certificates \
+    curl \
+    software-properties-common && \
+    apt-get install -yq ssh git
+
+RUN add-apt-repository ppa:deadsnakes/ppa && \
+	apt-get update && \
+	apt-get install -y python3.7
+
+# Installing performance co-pilot.
+RUN apt-get install -y pcp pcp-gui
+
+# The name of the elektron executable.
+ARG elektronexecutablename=elektron
+ENV ELEKTRON_EXECUTABLE_NAME=$elektronexecutablename
+
+# HOST:PORT of the mesos master.
+ARG elektronmesosmasterlocation=localhost:5050
+ENV ELEKTRON_MESOS_MASTER_LOCATION=$elektronmesosmasterlocation
+
+# Workload to be scheduled.
+ARG elektronworkload=workload_sample.json
+ENV ELEKTRON_WORKLOAD=$elektronworkload
+
+# Prefix of the log directory.
+ARG elektronlogdirprefix=Elektron-Test-Run
+ENV ELEKTRON_LOGDIR_PREFIX=$elektronlogdirprefix
+
+# Creating directory into which the current directory is going to be mounted.
+RUN mkdir /elektron
+
+WORKDIR /elektron
+
+CMD ["--help"]
+
+ENTRYPOINT ./$ELEKTRON_EXECUTABLE_NAME -m $ELEKTRON_MESOS_MASTER_LOCATION -w $ELEKTRON_WORKLOAD -p $ELEKTRON_LOGDIR_PREFIX $@