Build manual page does not explain the --network argument

[dgilman]

File: engine/reference/commandline/build.md

It would be useful to have a link over to the networking documentation which lists and explains all the choices for the --network flag.

[Bafff]

@dgilman Do you know that you can have alias with this flag? :)

[docker-robott]

There hasn't been any activity on this issue for a long time.
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[dgilman]

/lifecycle frozen