I ran
docker run -it -v /home/hostuser/.ssh/:/root/.ssh ubuntu:18.04but cloning does not work and this is what ls -lah /root/.ssh gives inside the docker container:
-rw------- 1 1001 1001 1.5K Apr 8 12:28 authorized_keys -rw-rw-r-- 1 1001 1001 208 Apr 29 09:15 config -rw------- 1 1001 1001 432 Apr 8 12:53 id_ed25519 -rw-r--r-- 1 1001 1001 119 Apr 8 12:53 id_ed25519.pub -rw------- 1 1001 1001 432 Apr 29 09:16 id_gitlab -rw-r--r-- 1 1001 1001 119 Apr 29 09:25 id_gitlab.pub -rw-rw-r-- 1 1001 1001 3.1K Apr 29 09:33 known_hosts