Try using Ruby Bundler image

1 job for develop in 58 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Deploy
failed #994
pages

00:00:58

 
Name Stage Failure
failed
pages Deploy
drwxr-xr-x 1 root root 4.0K Apr 23 15:48 ..
drwxr-xr-x 2 root root 4.0K Apr 23 15:48 cache
$ ls -lah /usr/gem/cache
total 8.0K
drwxr-xr-x 2 root root 4.0K Apr 23 15:48 .
drwxr-xr-x 3 root root 4.0K Apr 23 15:48 ..
$ apk add npm
/bin/bash: line 98: apk: command not found
ERROR: Job failed: exit code 1