README.md in kitchen-docker-2.13.0 vs README.md in kitchen-docker-2.14.0

@@ -581,9 +581,19 @@
     - /run/lock
     - /tmp
     net: br3
 ```
 
+### build_tempdir
+
+Relative (to `build_context`) temporary directory path for built Dockerfile.
+
+Example:
+
+```yaml
+  build_tempdir: .kitchen
+```
+
 ### use_internal_docker_network
 
 If you want to use kitchen-docker from within another Docker container you'll
 need to set this to true. When set to true uses port 22 as the SSH port and
 the IP of the container that chef is going to run in as the hostname so that