Add host to known hosts

.gitlab-ci.yml

@@ -116,6 +116,9 @@ cc-lyon:
     image: docker.km3net.de/base/ci-helper:1
     stage: release
     script:
+        - mkdir -p /root/.ssh && chmod 700 /root/.ssh
+        - ssh-keyscan -H $IN2P3_HOST > ~/.ssh/known_hosts
+        - chmod 600 /root/.ssh/known_hosts
         - sshpass -p $IN2P3_PASSWORD ssh -v $IN2P3_USERNAME@$IN2P3_HOST 'export MODULEPATH=/pbs/throng/km3net/modulefiles; source /usr/share/Modules/init/bash; module load python/3.7.5; pip install git+https://git.km3net.de/km3py/km3io.git'
     # only:
     #     -tags