Errors like "debconf: unable to initialize frontend: Dialog" appear if ENV DEBIAN_FRONTEND noninteractive is not set

[SohamChakraborty]

Hi,

Without using ENV DEBIAN_FRONTEND noninteractive in Dockerfile, the build process spews out messages like:

debconf: unable to initialize frontend: Dialog
debconf: (TERM is not set, so the dialog frontend is not usable.)
debconf: falling back to frontend: Readline
debconf: unable to initialize frontend: Readline
debconf: (This frontend requires a controlling tty.)
debconf: falling back to frontend: Teletype
dpkg-preconfigure: unable to re-open stdin:

I don't see any Dockerfile with the 'ENV DEBIAN_FRONTEND noninteractive' line. Is this something to include in the Dockerfile, James?

[jamtur01]

Sure. I don't usually bother as the error is harmless but you can add it if you like.