Update .gitlab-ci.yml

1 job for gitlab-ci in 17 seconds
Status Job ID Name Coverage
  Build
failed #40
alpine docker
build

00:00:17

 
Name Stage Failure
failed
build Build There is an unknown failure, please try again
(34/37) Installing x265 (2.5-r0)
(35/37) Installing xvidcore (1.3.4-r0)
(36/37) Installing ffmpeg-libs (3.4-r1)
(37/37) Installing ffmpeg (3.4-r1)
Executing busybox-1.27.2-r7.trigger
OK: 234 MiB in 95 packages
$ adduser -S icecast
$ su - icecast
ERROR: Job failed: exit code 1