README.md in t2_airtime-0.5.0 vs README.md in t2_airtime-0.5.1

@@ -1,9 +1,10 @@
 [![Build Status](https://travis-ci.org/matteolc/t2_airtime.svg?branch=master)](https://travis-ci.org/matteolc/t2_airtime) 
 [![Gem Version](https://badge.fury.io/rb/t2_airtime.svg)](https://badge.fury.io/rb/t2_airtime)
 [![GitHub version](https://badge.fury.io/gh/matteolc%2Ft2_airtime.svg)](https://badge.fury.io/gh/matteolc%2Ft2_airtime)
 [![Dependency Status](https://gemnasium.com/badges/github.com/matteolc/t2_airtime.svg)](https://gemnasium.com/github.com/matteolc/t2_airtime)
+[![Code Climate](https://codeclimate.com/github/matteolc/t2_airtime.png)](https://codeclimate.com/github/matteolc/t2_airtime)
 
 t2-airtime
 ==========
 
 [T2-Airtime](https://matteolc.github.io/t2_airtime/) client, `t2_airtime`.
@@ -23,16 +24,35 @@
 Download image:
 
 ```
 docker pull voxbox/t2_airtime
 ```
-Run `docker run voxbox/t2_airtime`
 
-Build from source code:
+Export your secrets:
 
+```sh
+export T2_SHOP_USER=<your_username>
+export T2_AIRTIME_KEY=<your_token>
 ```
-docker build -t "voxbox/t2_airtime" .
+
+Export the host allowed to access the API (CORS):
+```sh
+export CORS_ORIGIN=<your_frontend_address>
 ```
+
+Run:
+
+```sh
+docker run -d \
+  --name t2_airtime \
+  -p 3000:3000 \
+  -e T2_SHOP_USER \
+  -e T2_AIRTIME_KEY \
+  -e CORS_ORIGIN \
+  voxbox/t2_airtime
+docker logs t2_airtime -f  
+```
+
 
 ### Setup Transfer-To credentials
 
 1. Make sure you are a registered user of [Transfer-To](https://www.transfer-to.com/home).
 2. Enable Two Factor Authentication (2FA) in your [Transfer-To Shop](https://shop.transferto.com) Security Center section
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