How to use the ghost-ignition.config function in ghost-ignition

var config = require('ghost-ignition').config();

// see defaults in GhostLogger
var logging = require('ghost-ignition').logging({
    path: config.get('logging:path'),
    domain: config.get('logging:domain'),
    mode: config.get('logging:mode'),
    level: config.get('logging:level'),
    transports: config.get('logging:transports')
});

module.exports = logging;

var debug = require('ghost-ignition').debug('ghost-version'),
    exec = require('child_process').exec,
    config = require('ghost-ignition').config(),
    fetchGhostVersion,
    middleware,
    ghostVersion,
    ttl;

fetchGhostVersion = function fetchGhostVersion() {
    debug('Ghost version not set or ttl expired');
    exec('npm show ghost version', function (err, stdout, stderr) {
        if (err) {
            debug('fetchGhostVersion err', err);
        }

        if (stderr) {
            debug('fetchGhostVersion stderr', stderr);
        }