Algo Docker

Please copy the following script to a file and execute the files.
readUserInputs() {
  variable=""
  eval input="$1"
  eval length="$2"
  while true
  do
    read -p "$input"  variable
    if [ ${#variable} -lt $length ]
    then
        echo "Input is not valid minimun $2 characters required"
    else
        break
    fi
  done
  eval "$3=$variable"
}

function ConfigureComposefile() {
echo '
version: "3"
services:
  algoagent:
    container_name: algoAgent
    privileged: true
    image: "algosaas/algo_agent"
    network_mode: host
    # environment:
    #   LOG_LEVEL: "debug"
    restart: always
    volumes:
      - "/opt/AlgoAgent/logs:/opt/AlgoAgent/logs"
      - "/opt/AlgoAgent/salt:/etc/salt"
      - "/opt/AlgoAgent/minion:/var/lib/salt/pki/minion"
      - "/opt/AlgoAgent/cache:/var/cache/salt"
' > /opt/AlgoAgent/docker-compose.yaml
}

function ConfigureAgent() {
    secret_key=""
    secret_key_confirm=""
    domain=""
    echo "*****************************************"
    readUserInputs "Please\ enter\ your\ Domain\ Without\ https:-\ " 6 domain
    readUserInputs "Please\ enter\ your\ SecretKey:-\ " 6 secret_key
    readUserInputs "Please\ confirm\ your\ SecretKey:-\ " 6 secret_key_confirm
    echo "*****************************************"
    if [ "$secret_key" != "$secret_key_confirm" ]; then
        echo "Secret Key is not matching with confirm SecretKey"
        exit
    fi
    mkdir -p /opt/AlgoAgent/{logs,salt,minion,cache,salt/minion.d}
    echo 'id: '$secret_key > /opt/AlgoAgent/salt/minion.d/minion.conf
    echo 'master: '$domain >> /opt/AlgoAgent/salt/minion.d/minion.conf
    echo '
grains_cache: True
grains_cache_expiration: 86400
random_reauth_delay: 60
recon_default: 1000
recon_max: 59000
recon_randomize: True
' >> /opt/AlgoAgent/salt/minion.d/minion.conf
}

dock_exists=`which docker`
if [ $? == 0 ]; then
    ConfigureAgent
    ConfigureComposefile
    cd /opt/AlgoAgent/
    docker-compose pull
    echo "Please change directory to /opt/AlgoAgent/ and run docker-compose up -d for starting docker service"
else
    echo "Docker Not Installed In The System"
    echo "For Debian/Ubuntu install using apt command install docker.io docker-compose"
    echo "For RPM based install using command yum install docker docker-compose"
fi