Document how to bind a local config file .weblate using wlc docker

[nijel]

Please also document how to bind a local config file .weblate using docker

docker run -v $(pwd):/home/weblate --rm weblate/wlc:edge show

Source for /home/weblate: https://github.com/WeblateOrg/wlc/blob/e2139fb8059a3a7d70425befb9ceb936a4ca15a5/Dockerfile#L13

Feel free to add this example

$ docker run -v $(pwd):/home/weblate --rm weblate/wlc:edge show
branch: QA_5_1
file_format: po
filemask: po/*.po
git_export: https://hosted.weblate.org/git/phpmyadmin/5-1/
license: GPL-3.0-or-later
license_url: https://www.gnu.org/licenses/gpl-3.0-standalone.html
name: 5.1
new_base: po/phpmyadmin.pot
project: phpmyadmin
repo: https://github.com/phpmyadmin/phpmyadmin.git
slug: 5-1
source_language: en
template: 
url: https://hosted.weblate.org/api/components/phpmyadmin/5-1/
vcs: git
web_url: https://hosted.weblate.org/projects/phpmyadmin/5-1/

Brought up by @williamdes in WeblateOrg/wlc#66

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