Fix: Revert Cluster Setup File (#342)

* Reverted changes of cluster setup

* Reverted cluster setup file

inst/startup/cluster_setup.sh

@@ -1,4 +1,27 @@
 #!/bin/bash
-wget https://github.com/Azure/batch-insights/releases/download/go-beta.1/batch-insights
-chmod +x batch-insights
-./batch-insights > node-stats.log &
+# Entry point for the start task. It will install the docker runtime and pull down the required docker images
+apt-get -y install linux-image-extra-$(uname -r) linux-image-extra-virtual
+
+apt-get -y install apt-transport-https
+apt-get -y install curl
+apt-get -y install ca-certificates
+apt-get -y install software-properties-common
+
+ # Install docker
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
+apt-get -y update
+apt-get -y install docker-ce
+
+# Unzip resource files and set permissions
+apt-get -y install zip unzip
+
+# Check docker is running
+docker info > /dev/null 2>&1
+if [ $? -ne 0 ]; then
+  echo "UNKNOWN - Unable to talk to the docker daemon"
+  exit 3
+fi
+
+ # Create required directories
+mkdir -p /mnt/batch/tasks/shared/R/packages