The oath-proxy image is pulled from dockerhub, see below

oc get is
NAME DOCKER REPO TAGS UPDATED
fuse-ignite-meta docker-registry.default.svc:5000/fuse-online/fuse-ignite-meta 1.4 6 minutes ago
fuse-ignite-s2i docker-registry.default.svc:5000/fuse-online/fuse-ignite-s2i 1.4 6 minutes ago
fuse-ignite-server docker-registry.default.svc:5000/fuse-online/fuse-ignite-server 1.4 6 minutes ago
fuse-ignite-ui docker-registry.default.svc:5000/fuse-online/fuse-ignite-ui 1.4 6 minutes ago
fuse-online-operator docker-registry.default.svc:5000/fuse-online/fuse-online-operator 1.4 6 minutes ago
jboss-amq-63 docker-registry.default.svc:5000/fuse-online/jboss-amq-63 1.3 5 minutes ago
oauth-proxy docker-registry.default.svc:5000/fuse-online/oauth-proxy v1.1.0 6 minutes ago
prometheus docker-registry.default.svc:5000/fuse-online/prometheus v2.1.0 6 minutes ago
todo docker-registry.default.svc:5000/fuse-online/todo latest 2 minutes ago
[root@bastion ~]# oc describe is oauth-proxy
Name: oauth-proxy
Namespace: fuse-online
Created: 6 minutes ago
Labels: syndesis.io/app=syndesis
syndesis.io/component=syndesis-oauthproxy
syndesis.io/type=infrastructure
Annotations: openshift.io/image.dockerRepositoryCheck=2018-11-03T16:57:58Z
Docker Pull Spec: docker-registry.default.svc:5000/fuse-online/oauth-proxy
Image Lookup: local=false
Unique Images: 1
Tags: 1

v1.1.0
updates automatically from registry docker.io/openshift/oauth-proxy:v1.1.0

• docker.io/openshift/oauth-proxy@sha256:731c1fdad1de4bf68ae9eece5e99519f063fd8d9990da312082b4c995c4e4e33
  6 minutes ago