Merge branch '7-gerer-la-configuration' into 'master'

Resolve "Gérer la configuration"

Closes thecodingmachine#7

See merge request tcm-projects/react-native-boilerplate!15

App/Config/.gitignore

@@ -0,0 +1 @@
+index.js

App/Config/README.md

@@ -0,0 +1,25 @@
+This directory contains configuration variables in 3 files:
+- `index.dev.js` : contains development variables
+- `index.production.js` : contains production variables
+- `index.staging.js` : contains beta tests variables
+
+You need to create `index.js` by copying the right file.
+
+#### Warning
+Each time you need to build, you need to verify if your `index.js` is the right one.
+For example, during development, before building your app do:
+```
+cp App\Config\index.dev.js App\Config\index.js
+```
+In other environment, you must pay attention to change your `index.js` with the good one.
+Also, make sure you add each configuration variable in each configuration file.
+
+#### Usage
+```
+import Config from 'App/Config'
+
+...
+let uri = Config.API_URL
+...
+
+```

App/Config/index.dev.js

@@ -0,0 +1,4 @@
+export const Config = {
+  API_URL: 'https://query.yahooapis.com/v1/public/',
+  API_PREFIX: 'api',
+}

App/Config/index.production.js

@@ -0,0 +1,4 @@
+export const Config = {
+  API_URL: 'https://query.yahooapis.com/v1/public/',
+  API_PREFIX: 'api',
+}

App/Config/index.staging.js

@@ -0,0 +1,4 @@
+export const Config = {
+  API_URL: 'https://query.yahooapis.com/v1/public/',
+  API_PREFIX: 'api',
+}

App/Service/WeatherService.js

@@ -1,7 +1,8 @@
 import { create } from 'apisauce'
+import { Config } from 'App/Config'
 
 const weatherApiClient = create({
-  baseURL: 'https://query.yahooapis.com/v1/public/',
+  baseURL: Config.API_URL,
   headers: {
     Accept: 'application/json',
     'Content-Type': 'application/json',