Using #fonts with node-mapnik
▻https://github.com/mapnik/node-mapnik/blob/master/docs/Using-Fonts.md#global
Mapnik supports rendering custom fonts from a variety of formats. Fonts can either be registered globally or per #map. Normally global font registration is what you need, but per map registration can help reduce memory usage and increase performance in specialized cases.
/usr/share/fonts/ and /usr/local/share/fonts/ on other Unix systems