Pygrum

Thanks for the library! This issue is really a feature request. ### Request It would be useful to me and potentially others to not have the default completer completely overriden...

``` FROM ubuntu:16.04 as base ENV USER=user ENV HOME=/home/$USER ENV GOPATH=$HOME/work ENV PATH=/usr/local/go/bin:$PATH RUN apt-get -qq update && apt-get --no-install-recommends -qq -y install ca-certificates curl git RUN GO=go1.21.10.linux-amd64.tar.gz && curl...