In reStructured text documentation we somtimes find formatting problems.
Therefore I would like to add 'make htmldocs' to our Gitlab Ci steps and
let all warning result in a build failure.

For building the htmldocs target without warnings we need the Graphviz
package.

Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
resent due to missing Cc:u-boot@lists.denx.de
---
 Dockerfile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Dockerfile b/Dockerfile
index d73ff3f..7d6d322 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -49,6 +49,7 @@ RUN apt-get update && apt-get install -y \
        flex \
        gdisk \
        git \
+       graphviz \
        grub-efi-amd64-bin \
        grub-efi-ia32-bin \
        iasl \
--
2.24.1

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