Try disabling dind as a service

5 jobs for master in 31 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Build
failed build #19

00:00:31

failed build #15

00:00:18

failed build #16

00:00:19

failed build #17

00:00:18

failed build #18

00:00:37

 
Name Stage Failure
failed
build Build
WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.7/main/x86_64/APKINDEX.tar.gz: temporary error (try again later)
WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.7/community/x86_64/APKINDEX.tar.gz: temporary error (try again later)
ERROR: unsatisfiable constraints:
nginx (missing):
required by: world[nginx]
supervisor (missing):
required by: world[supervisor]
The command '/bin/sh -c apk add --no-cache nginx supervisor' returned a non-zero code: 2
ERROR: Job failed: exit code 2