[extensions-web] ci: Switch frontend to fully qualified base image

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit 90c882ac6b160761210a3f84ac2400c1ef106956
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Tue May 24 10:41:23 2022 +0200

    ci: Switch frontend to fully qualified base image

 openshift/docker/nginx/Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/openshift/docker/nginx/Dockerfile b/openshift/docker/nginx/Dockerfile
index df19f0c..61d89d2 100644
--- a/openshift/docker/nginx/Dockerfile
+++ b/openshift/docker/nginx/Dockerfile
@@ -1,4 +1,4 @@
-FROM nginx:stable
+FROM docker.io/library/nginx:stable
 
 LABEL author="Yuri Konotopov <ykonotopov gnome org>"