message: Update error message with docker group instructions
diff: @@ -81,14 +81,16 @@ function log_for_sentry() {
  # Check to see if docker is installed.
  function verify_docker_installed() {
  if ! command_exists docker; then
  - log_error "Docker CE must be installed, please run \"curl -sS https://get.docker.com/ | sh\" or visit https://docs.docker.com/install/"
  + log_error "\
  +Docker CE must be installed, please run \"curl -sS https://get.docker.com/ | sh\" or visit https://docs.docker.com/install/
  +After installing Docker you will need to add your user to the docker group, for example by running \"sudo usermod -a -G docker \$USER && newgrp docker\""
  exit 1
  fi
  }
  function verify_docker_running() {
  if ! docker info > /dev/null 2>&1 ; then
  - log_error "dockerd is not running."
  + log_error "dockerd is not running. You may need to add your user to the docker group, for example by running \"sudo usermod -a -G docker \$USER && newgrp docker\""
  exit 1
  fi
  }
  