Constant FLIGHT_SPEC 

pub const FLIGHT_SPEC: &str = "FLIGHT SPEC

    The Flight may be specified in one of the following ways

    FLIGHT_SPEC := NAME | ID | @path | @- | INLINE-SPEC
    NAME        := The local Flight Plan name
    ID          := The local hex-encoded ID of the Flight Plan
    @path       := PATH is an existing file with a Flight Plan definition in JSON format
    @-          := STDIN will be read for a Flight Plan definition in JSON format
    INLINE-SPEC := Comma separated LIST of ATTRIBUTE
    ATTRIBUTE   := image=IMAGE [ | name=NAME | minimum=NUM | maximum=NUM | api-permission | architecture=ARCH ]
    NUM         := Positive integer (minimum default is 1 if omitted; maximum default is 'autoscale as needed')
    ARCH        := amd64 | arm64

    NOTE that when using @- only one Flight Plan may be provided via STDIN";