Add Edit on GitLab links

conf.py

@@ -115,6 +115,14 @@ html_static_path = ['_static']
 #
 # html_sidebars = {}
 
+# Add context to make Edit on GitLab links. Borrowed from Drutopia docs config.
+html_context = {
+    "display_gitlab": True, # Integrate Gitlab
+    "gitlab_user": "agaric", # Organization
+    "gitlab_repo": "documentation", # Repo name
+    "gitlab_version": "master", # Version
+    "conf_py_path": "/", # Path in the checkout to the docs root
+}
 
 # -- Options for HTMLHelp output ---------------------------------------------