Added GitLab and changed minio to deep link docs  (#1752)
Added GitLab and changed minio to deep link docs  (#1752)

* Software exposing Prometheus metrics: +GitLab

Signed-off-by: klml <6b0d31c0d563223024da45691584643ac78c96e8@klml.de>

* Software exposing Prometheus metrics: minio deep link to https://docs.minio.io/docs/how-to-monitor-minio-using-prometheus.html

Signed-off-by: klml <6b0d31c0d563223024da45691584643ac78c96e8@klml.de>
prometheus/docs,prometheus/docs,prometheus/docs