A small module to allow global config settings to be set for all services within the Overleaf architecture.
You can specify a custom location for the settings file by setting the
OVERLEAF_CONFIG environment variable. E.g.
$ export OVERLEAF_CONFIG=/home/james/config/settings.development.js
Otherwise, the settings will be loaded from config/settings.NODE_ENV.js,
where NODE_ENV is another environment variable, or defaults to development.
The config directory is first looked for in the current directory, and then relative to the settings module directory.