Please describe the problem.

This is more of a feature request then a bug.

It would be nice and more intuitive if the webapp --listen parameter accepted a port specifier too allowing configuration of the port.

For my workflow, I thought I would contain all of git annexes dependencies inside a docker image since I'm quite comfortable with docker(and emerge on gentoo took a long time and finally failed). With an unconfigurable dynamic port though, it makes running the webapp subcommand in docker not really viable since I don't want to use docker run's port range mapping feature which will lock all those ports.

What steps will reproduce the problem?

Dockerfile: ARG DEBIAN_TAG=buster-slim FROM debian:${DEBIAN_TAG}

RUN set -ex \ && apt-get update \ && apt-get install -y \ git \ git-annex

docker build -t git-annex:test . docker run --rm -it git-annex:test git annex webapp --listen

What version of git-annex are you using? On what operating system?

git-annex version: 7.20190129 build flags: Assistant Webapp Pairing S3(multipartupload)(storageclasses) WebDAV Inotify DBus DesktopNotify TorrentParser MagicMime Feeds Testsuite dependency versions: aws-0.20 bloomfilter- cryptonite-0.25 DAV-1.3.3 feed- ghc-8.4.4 http-client- persistent-sqlite-2.8.2 torrent-10000.1.1 uuid-1.3.13 yesod-1.6.0

Please provide any additional information below.

# If you can, paste a complete transcript of the problem occurring here.
# If the problem is with the git-annex assistant, paste in .git/annex/daemon.log

# End of transcript or log.

Have you had any luck using git-annex before? (Sometimes we get tired of reading bug reports all day and a lil' positive end note does wonders)

git annex seems awesome with the little bit of testing I've done. It seems like the perfect tool for what I want to accomplish. Thanks!