add org id explanation

docs.json

@@ -72,6 +72,13 @@
                                 ]
                             },
                             "manage/domains",
+                            {
+                                "group": "Organizations",
+                                "icon": "building",
+                                "pages": [
+                                    "manage/organizations/org-id"
+                                ]
+                            },
                             {
                                 "group": "Access Control",
                                 "icon": "user-group",

manage/organizations/org-id.mdx

@@ -0,0 +1,16 @@
+---
+title: "Organization ID"
+description: "Understand organization IDs and how to locate yours in the dashboard"
+---
+
+Pangolin is multi-tenant. All sites, resources, clients, and other items belong to an organization, and a server can host more than one organization.
+
+Each organization has a unique ID that Pangolin generates when you create the organization. You cannot change the ID after creation, and it is separate from the display name.
+
+## Finding your organization ID
+
+You can find your organization ID in two ways:
+
+1. Check the general settings page for your organization. The ID appears at the top of the info card.
+
+2. Check the URL path when viewing your dashboard. The org ID is the first slug in the URL. For example, in `https://app.pangolin.net/home-lab/settings/sites`, the org ID is `home-lab`.