Update .gitlab-ci.yml

Status Job ID Name Coverage
  Deploy
failed #44902118
pages

00:00:24

 
Name Stage Failure
failed
pages Deploy There is an unknown failure, please try again
Using docker image almarklein/py36 ID=sha256:5be5c5957c6c5b7ed030631da8e99f4d7601ee6cbdc9e02bf85c471a1038fa99 for build container...
Running on runner-4e4528ca-project-4916626-concurrent-0 via runner-4e4528ca-srm-1513529939-39e23b11...
Cloning repository...
Cloning into '/builds/zoof/zoof.gitlab.io'...
Checking out a6c4463b as master...
Skipping Git submodules setup
$ mv . public
mv: cannot move ‘.’ to ‘public’: Device or resource busy
ERROR: Job failed: exit code 1