Add documentation for path

docs/api.json

@@ -31,6 +31,11 @@
             "type": "number",
             "description": "Server port. Defaults to <code>80</code>."
           },
+          {
+            "name": "path",
+            "type": "string",
+            "description": "The path where your self-hosted PeerServer is running. Defaults to <code>'/'</code>."
+          },
           {
             "name": "secure",
             "type": "boolean",