Update .gitlab-ci.yml

1 job for master in 37 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
failed #56
alpine docker
build

00:00:37

 
Name Stage Failure
failed
build Build There is an unknown failure, please try again
|| chmod -R a+r "opusfile-0.10-11-g00ef888"
tardir=opusfile-0.10-11-g00ef888 && ${TAR-tar} chof - "$tardir" | eval GZIP= gzip --best -c >opusfile-0.10-11-g00ef888.tar.gz
rm -f opusfile-0.10-11-g00ef888.zip
zip -rq opusfile-0.10-11-g00ef888.zip opusfile-0.10-11-g00ef888
/bin/bash: zip: command not found
make[1]: *** [Makefile:883: dist-zip] Error 127
make[1]: Leaving directory '/builds/ePirat/opusfile'
make: *** [Makefile:887: dist] Error 2
ERROR: Job failed: exit code 2