log4j config fails to copy

[jfletcher-nuxeo]

Describe the bug
From 0_register.sh, this is the output:

nuxeo_1          | ENTRYPOINT: Looking for shell scripts in /docker-entrypoint-initnuxeo.d
nuxeo_1          | Running /docker-entrypoint-initnuxeo.d/0_register.sh
nuxeo_1          | Copying server log configuration to init folder
nuxeo_1          | ‘/opt/nuxeo/server/lib/log4j2.xml’ -> ‘/docker-entrypoint-initnuxeo.d/log4j2.xml’
nuxeo_1          | cp: cannot create regular file ‘/docker-entrypoint-initnuxeo.d/log4j2.xml’: Permission denied
nuxeo_1          | Unable to copy server log configuration

To Reproduce
Steps to reproduce the behavior:

1. Start Nuxeo container
2. Watch logs (nxl)

Expected behavior
No error, debug config is correctly copied.

Context
Fails on AWS presales stack. Works ok on localhost.