Merge pull request docker-library#2198 from benrobot/nginx-fix-cache-…

…container-path

nginx - Fix container path for cache dir to prevent error mkdir() "/var/cache/nginx/client_temp" failed (2: No such file or directory)

nginx/content.md

@@ -110,7 +110,7 @@ This behavior can be changed via the following environment variables:
 
 ## Running %%IMAGE%% in read-only mode
 
-To run %%IMAGE%% in read-only mode, you will need to mount a Docker volume to every location where %%IMAGE%% writes information. The default %%IMAGE%% configuration requires write access to `/var/cache` and `/var/run`. This can be easily accomplished by running %%IMAGE%% as follows:
+To run %%IMAGE%% in read-only mode, you will need to mount a Docker volume to every location where %%IMAGE%% writes information. The default %%IMAGE%% configuration requires write access to `/var/cache/nginx` and `/var/run`. This can be easily accomplished by running %%IMAGE%% as follows:
 
 ```console
 $ docker run -d -p 80:80 --read-only -v $(pwd)/nginx-cache:/var/cache/nginx -v $(pwd)/nginx-pid:/var/run nginx