From 6acf9d24f8f32feac82773a3549f1d1d869d787a Mon Sep 17 00:00:00 2001
From: Earlopain <14981592+Earlopain@users.noreply.github.com>
Date: Thu, 25 Jan 2024 10:55:44 +0100
Subject: [PATCH] Add a note about caching and docker to the readme

---
 README.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/README.md b/README.md
index 4a5892731c..d851908af0 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,17 @@ require:
 Now you can run `rubocop` and it will automatically load the RuboCop Rails
 cops together with the standard cops.
 
+#### Usage with Docker
+
+When you use Docker make sure that the RuboCop [cache path](https://docs.rubocop.org/rubocop/usage/caching.html#cache-path) is mounted as a volume in order to reliably persist the cache.
+
+If developing a Rails application there already exists a temporary directory you should be persisting anyways: `tmp` in the application root folder. You can point the RuboCop cache there:
+
+```yml
+AllCops:
+  CacheRootDirectory: tmp/cache
+```
+
 ### Command line
 
 ```sh