Use slim ,not alpine for jdk8.

3 jobs for master in 1 minute and 22 seconds (queued for 1 second)
Status Job ID Name Coverage
  Testing
passed #109917152
verify:jdk11

00:01:21

94.52%
failed #109917150
verify:jdk8

00:00:44

 
  Post Release
skipped #109917153
pages
 
Name Stage Failure
failed
verify:jdk8 Testing
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
Running after script...
$ rm -rf .m2/repository/net/morimekta/utils/diff-util/*-SNAPSHOT/ || /bin/true
Uploading artifacts...
WARNING: target/surefire-reports/TEST-*.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit code 1