docker: install kmod

When building artifacts in the docker container, the build system
complained about the missing lsmod command. This change adds the
required package to the docker container, so that the command can be
executed as expected.

Signed-off-by: Norbert Manthey <[email protected]>

Author: nmanthey

tools/docker/Dockerfile

@@ -4,6 +4,6 @@ FROM ubuntu:20.04
 RUN apt-get update -y
 RUN apt-get install -y gcc make xorriso qemu-utils
 # grub is a bit special in containers
-RUN DEBIAN_FRONTEND=noninteractive apt-get -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" install grub2 python
+RUN DEBIAN_FRONTEND=noninteractive apt-get -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" install grub2 kmod python
 
 CMD ["/bin/bash"]