vips text renders as a tofu in Alpine Linux

[Nakilon]

See felixbuenemann/vips-alpine#3 (comment)
Since the problem also appears even when based on the Dockerfile from this repo I decided to create the Issue here.

[jcupitt]

Tofu means fontconfig couldn't find a font that satisfied the requirements.

It looks like alpine does not install any fonts by default. I added this and it seems to work:

RUN apk add \
        pango-dev \
        msttcorefonts-installer
RUN update-ms-fonts \
        && fc-cache -f

[Nakilon]

Thank you!