--- a/client/src/config.js	Fri Jun 23 18:50:57 2017 +0200
+++ b/client/src/config.js	Mon Jun 26 15:21:06 2017 +0200
@@ -1,6 +1,8 @@
 // define application configuration
 
 export default {
-  apiRootUrl: process.env.REACT_APP_API_ROOT_URL,
-  basename: process.env.REACT_APP_BASENAME
+  apiRootUrl: process.env.REACT_APP_API_ROOT_URL || 'http://localhost:8000',
+  basename: process.env.REACT_APP_BASENAME || '',
+  networkStatusTimeout: parseInt(process.env.REACT_APP_NETWORK_STATUS_TIMEOUT, 10) || 2000,
+  networkStatusInterval: parseInt(process.env.REACT_APP_NETWORK_STATUS_INTERVAL, 10) || 2000,
 }