gitlabci: Add gtk-doc to the container image.

diff --git a/.gitlab-ci/Dockerfile b/.gitlab-ci/Dockerfile
index 84005c8324a79f469d81f22c52ed524f0234f43a..32fa7e7c623cd7296b68ce8228d9e21d075bcc24 100644 (file)
--- a/.gitlab-ci/Dockerfile
+++ b/.gitlab-ci/Dockerfile
@@ -28,6 +28,7 @@ RUN dnf -y install \
     gstreamer1-plugins-good \
     gstreamer1-plugins-bad-free-devel \
     gstreamer1-plugins-base-devel \
+    gtk-doc \
     iso-codes \
     itstool \
     json-glib-devel \