Update .gitlab-ci.yml

2 jobs for master in 3 minutes and 6 seconds (queued for 43 seconds)
Status Job ID Name Coverage
  Build
passed #36
react-client
build

00:02:55

 
  Test
failed #37
react-client
test

00:00:10

 
Name Stage Failure
failed
test Test
No URL provided, cache will not be downloaded from shared cache server. Instead a local version of cache will be extracted. 
Successfully extracted cache
Executing "step_script" stage of the job script
$ echo "packaging"
packaging
$ tar -zvf build
tar: You must specify one of the '-Acdtrux', '--delete' or '--test-label' options
Try 'tar --help' or 'tar --usage' for more information.
ERROR: Job failed: exit code 1