What fonts are available in the torizoncore-docker image?

I’m experimenting with displaying some simple messages on the startup splash screen using the plymouth message --text="This is my message" command. However, the message only renders as blank squares. The default theme calls out “Cantarell” but I am guessing this means the font is not present on the system. I tried removing the font entries entirely but it did not make a difference.

What fonts (if any?) are shipped on the default OS image?

Update: I found out there are no fonts on the system at all. I placed DejaVu Sans in /usr/share/fonts and now text is properly rendered instead of empty squares.