Add ZuulCI as onprem CI resource

Zuul is an open source program that drives continuous integration,
delivery, and deployment systems with a focus on project gating and
interrelated projects.

https://zuul-ci.org/

config.py

@@ -78,6 +78,7 @@ ALIASES = {
             "Gitlabci": "GitlabCI",
             "Travisci": "TravisCI",
             "Teamcity": "TC",
+            "Zuulci": "ZuulCI",
         },
         "container": {
             "Rkt": "RKT",

diagrams/onprem/ci.py

@@ -28,9 +28,14 @@ class Travisci(_Ci):
     _icon = "travisci.png"
 
 
+class Zuulci(_Ci):
+    _icon = "zuulci.png"
+
+
 # Aliases
 
 CircleCI = Circleci
 GitlabCI = Gitlabci
 TravisCI = Travisci
 TC = Teamcity
+ZuulCI = Zuulci

docs/nodes/onprem.md

@@ -28,6 +28,7 @@ Node classes list of onprem provider.
 - **diagrams.onprem.ci.Jenkins**
 - **diagrams.onprem.ci.Teamcity**, **TC** (alias)
 - **diagrams.onprem.ci.Travisci**, **TravisCI** (alias)
+- **diagrams.onprem.ci.Zuulci**, **ZuulCI** (alias)
 
 ## onprem.client