Add no-docker CLI option to install command

[nexdrew]

Since the Docker install script can have unwanted side effects and since the Replicated install script supports an option to skip the Docker install, we should allow folks to run the installer without running the Docker script. I'm thinking this could be supported in the following ways:

• Install the npme bin first and then run the install command with a flag:

  npm i npme -g --ignore-scripts
  npme install --no-docker

• Pass a flag/arg to the autoinstall command on bin installation:

  # this
  sudo DOCKER=false npm i npme -g --unsafe
  # or this
  DOCKER=false sudo -E npm i npme -g --unsafe

Here are the supported args from the Replicated install script:

# override these values with command line flags
while [ "$1" != "" ]; do
    _param=`echo "$1" | awk -F= '{print $1}'`
    _value=`echo "$1" | awk -F= '{print $2}'`
    case $_param in
        http-proxy|http_proxy)
            PROXY_ADDRESS="$_value"
            ;;
        local-address|local_address)
            PRIVATE_ADDRESS="$_value"
            ;;
        no-operator|no_operator)
            SKIP_OPERATOR_INSTALL=1
            ;;
        is-migration|is_migration)
            IS_MIGRATION=1
            ;;
        no-docker|no_docker)
            SKIP_DOCKER_INSTALL=1
            ;;
        no-proxy|no_proxy)
            NO_PROXY=1
            ;;
        airgap)
            AIRGAP=1
            ;;
        no-auto|no_auto)
            READ_TIMEOUT=
            ;;
        daemon-token|daemon_token)
            DAEMON_TOKEN="$_value"
            ;;
        tags)
            OPERATOR_TAGS="$_value"
            ;;
        *)
            echo >&2 "Error: unknown parameter \"$_param\""
            exit 1
            ;;
    esac
    shift
done