Add renovate.json

1 job for renovate/configure in 46 seconds
Name Stage Failure
failed
build Build
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store

Login Succeeded
$ docker build --pull -t $IMAGE_TAG .
invalid argument "registry.git.autistici.org/ai3/tools/smtpd-pipe:renovate/configure" for "-t, --tag" flag: invalid reference format
See 'docker build --help'.
Cleaning up file based variables
ERROR: Job failed: exit code 125