feat(rest): add gitlab_host to info endpoint (#740)

Author: CameronMcClymont

docs/openapi.json

@@ -481,6 +481,10 @@
                   "title": "Default workspace",
                   "value": "/usr/share"
                 },
+                "gitlab_host": {
+                  "title": "GitLab host",
+                  "value": "gitlab.cern.ch"
+                },
                 "interactive_session_recommended_jupyter_images": {
                   "title": "Recommended Jupyter images for interactive sessions",
                   "value": [

reana_server/rest/info.py

@@ -36,6 +36,7 @@
     REANA_DASK_CLUSTER_MAX_NUMBER_OF_WORKERS,
     REANA_DASK_CLUSTER_DEFAULT_SINGLE_WORKER_THREADS,
     REANA_DASK_CLUSTER_MAX_SINGLE_WORKER_THREADS,
+    REANA_GITLAB_HOST,
 )
 from reana_server.decorators import signin_required
 
@@ -355,6 +356,10 @@ def info(user, **kwargs):  # noqa
                     "title": "Dask workflows allowed in the cluster",
                     "value": "False"
                 },
+                "gitlab_host": {
+                    "title": "GitLab host",
+                    "value": "gitlab.cern.ch"
+                },
                 "dask_autoscaler_enabled": {
                     "title": "Dask autoscaler enabled in the cluster",
                     "value": "False"
@@ -477,6 +482,10 @@ def info(user, **kwargs):  # noqa
                 title="Dask workflows allowed in the cluster",
                 value=bool(DASK_ENABLED),
             ),
+            gitlab_host=dict(
+                title="GitLab host",
+                value=REANA_GITLAB_HOST,
+            ),
         )
 
         if DASK_ENABLED:
@@ -566,6 +575,8 @@ class InfoSchema(Schema):
     yadage_engine_packtivity_version = fields.Nested(StringInfoValue)
     snakemake_engine_version = fields.Nested(StringInfoValue)
     dask_enabled = fields.Nested(StringInfoValue)
+    gitlab_host = fields.Nested(StringInfoValue)
+
     if DASK_ENABLED:
         dask_autoscaler_enabled = fields.Nested(StringInfoValue)
         dask_cluster_default_number_of_workers = fields.Nested(StringInfoValue)