Merge branch 'test_gsfonts' into 'master'

Added gsfonts to solve the problem with some blank letter avatars.

See merge request !7

Dockerfile

@@ -12,7 +12,7 @@ RUN apt update && \
     # Install postgres
     postgresql-client-9.6 \
     # Install image utilities
-    advancecomp jpegoptim gifsicle libjpeg-progs libpng-dev optipng pngcrush pngquant jhead \
+    advancecomp jpegoptim gifsicle libjpeg-progs libpng-dev optipng pngcrush pngquant jhead gsfonts \
     # Install nodejs and npm
     nodejs npm && \
     # Install svgo