Permissions on /opt/app-root/src

The deployment container is unable to unpack wordpress in /opt/app-root/src given it's owned by root and not default. The logs are spammed with this sort of thing:

tar: wp-includes/js/tinymce/plugins/textcolor/plugin.js: Cannot open: No such file or directory
tar: wp-includes: Cannot mkdir: Permission denied

This causes the deployment to fail since wordpress never becomes available.