Added docs for the purge API

website/source/api/nodes.html.md

@@ -614,3 +614,48 @@ $ curl \
   "KnownLeader": false
 }
 ```
+
+## Purge Node
+
+This endpoint purges a node from the system. Nodes can still join the cluster if
+they are alive.
+
+| Method  | Path                      | Produces                   |
+| ------- | ------------------------- | -------------------------- |
+| `POST`  | `/v1/node/:node_id/purge` | `application/json`         |
+
+The table below shows this endpoint's support for
+[blocking queries](/api/index.html#blocking-queries) and
+[required ACLs](/api/index.html#acls).
+
+| Blocking Queries | ACL Required       |
+| ---------------- | ------------------ |
+| `NO`             | `node:write`       |
+
+### Parameters
+
+- `:node_id` `(string: <required>)`- Specifies the UUID of the node. This must
+  be the full UUID, not the short 8-character one. This is specified as part of
+  the path.
+
+### Sample Request
+
+```text
+$ curl \
+    https://nomad.rocks/v1/node/fb2170a8-257d-3c64-b14d-bc06cc94e34c/purge
+```
+
+### Sample Response
+
+```json
+{
+  "EvalIDs": [
+    "253ec083-22a7-76c9-b8b6-2bf3d4b27bfb"
+  ],
+  "EvalCreateIndex": 91,
+  "NodeModifyIndex": 90,
+  "Index": 90,
+  "LastContact": 0,
+  "KnownLeader": false
+}
+```