Add spinning loader (#23)

1 job for dev in 2 minutes and 54 seconds
Status Job ID Name Coverage
  Test
failed #44942
test_job

00:02:54

 
Name Stage Failure
failed
test_job Test
    The above error occurred in the <Context.Consumer> component:
in Connect(Component) (created by WrapperComponent)
in WrapperComponent

Consider adding an error boundary to your tree to customize error handling behavior.
Visit https://fb.me/react-error-boundaries to learn more about error boundaries.

The command '/bin/sh -c cd /srv/ensembl-client/ && NODE_ENV=development npm install && npm run test' returned a non-zero code: 1
ERROR: Job failed: exit code 1