Working gateway

Change-Id: I8ca690fe9d1b7f8e20b438df1ddd48d6b2f99326
diff --git a/src/config/config.js b/src/config/config.js
new file mode 100644
index 0000000..2671a26
--- /dev/null
+++ b/src/config/config.js
@@ -0,0 +1,37 @@
+(function () {
+  'use strict';
+  
+  // NOTE do we still need CLI args? 
+  // Won't be better to use NODE_ENV and the native node-yaml-config feature
+
+  const argv = require('yargs').argv;
+  const path = require('path');
+  const yaml_config = require('node-yaml-config');
+  const logger = require('../config/logger.js');
+
+  // if a config file is specified in as a CLI arguments use that one
+  const cfgFile = argv.config || 'config.yml';
+
+  let config;
+  try {
+    logger.log('debug', `Loading ${cfgFile}`);
+    config = yaml_config.load(path.join(__dirname, cfgFile));
+  }
+  catch(e) {
+    logger.log('debug', `No ${cfgFile} found, using default params`);
+  }
+
+  module.exports = {
+    xos: {
+      host: (config && config.xos) ? config.xos.host : 'xos',
+      port: (config && config.xos) ? config.xos.port : 9999
+    },
+    redis: {
+      host: (config && config.redis) ? config.redis.host : 'redis',
+      port: (config && config.redis) ? config.redis.port : 6379
+    },
+    gateway: {
+      port: (config && config.gateway) ? config.gateway.port : 3000
+    }
+  };
+})();
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