options:
    voicerss_key:
        type: string
        description: Voice RSS TTS Engine Key. http://www.voicerss.org/
        default: ""
    license_key:
        type: string
        description: TelScale Lincese Key. http://www.telestax.com/contactus/
        default: ""
    init_password:
        type: string
        description: Init admin password. this arg will affect install process only
        default: ""