Dockerfile: Add libsdl2-ttf-dev

This dependency is now required by the engine because of rendering
TrueType fonts.

1 files changed, 1 insertions, 0 deletions

diff --git a/Dockerfile b/Dockerfile
index e00fc33..d2d605d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -71,6 +71,7 @@ RUN apt-get update && \
         librhash-dev \
         libsdl2-dev \
         libsdl2-mixer-dev \
+        libsdl2-ttf-dev \
         libssl-dev \
         libxext-dev \
         make \