better config / install from cli / allow_registration

config/production.js

@@ -0,0 +1,12 @@
+const argv = require('yargs').argv
+const path = require('path')
+const fs = require('fs')
+
+const config_path = path.resolve(argv.config || '/etc/gancio_config.json')
+
+let config = {}
+if (fs.existsSync(config_path)) {
+  config = require(config_path)
+}
+
+module.exports = config