Add fonts to docker container

[jmaupetit]

We need to document custom font installation in a docker container.

[jmaupetit]

Maybe adding something like the following to the Dockerfile would be sufficient:

# Copy local fonts in an indexable place
COPY /srv/fonts ~/.fonts

# Update font cache
RUN fc-cache -f -v

Any font file under the local fonts directory will then be indexed and fully available.

@krichprollsch @lunika WDYT?

[krichprollsch]

I'm not a font specialist, but you could use a volume instead to load the fonts dynamically into the dir/usr/share/fonts/ of the container.
But that's mean you should also run fc-cache -f -v at runtime :/

[krichprollsch]

Or maybe using a volume to share your "compiled" fonts from your computer to the container to avoid the fc-cache at runtime ? I don't know if it's possible...

[jmaupetit]

After a brief discussion with @themouette, we think it's not that bad to rebuild your container when you need to use a new font. @krichprollsch do you agree?

[krichprollsch]

👍