Add ghostscript to app image, which is used by some tests.

larseggert · larseggert · commit e3b430d2ecf0 · 2021-12-02T08:09:08.000Z
Commit ready for merge.
 - Legacy-Id: 19741
diff --git a/docker/app.Dockerfile b/docker/app.Dockerfile
@@ -30,6 +30,7 @@ RUN apt-get install -qy \
 	fish \
 	gawk \
 	gcc \
+	ghostscript \
 	git \
 	gnupg \
 	graphviz \
