This repo provides the steps necessary to build a weechat docker image.
This image is available at: hub.docker.com/r/dennismp/weechat/
$ git clone https://github.com/dennis/docker-weechat
$ docker build --rm -t dennismp/weechat .
Standalone:
docker run -ti --rm --name=weechat -v /var/volumes/weechat:/weechat dennismp/weechat
or linked with bitlbee (use hostname 'bitlbee' when configuring weechat)
docker run -ti --rm --name=weechat --link=bitlbee -v /var/volumes/weechat:/weechat dennismp/weechat