support environment-variables for authentication and port configuration

.env.template

@@ -0,0 +1,4 @@
+export USERNAME=
+export PASSWORD=
+export DOMAIN=
+export PORT=

.gitignore

@@ -1,3 +1,4 @@
+/.env
 /.sass-cache/
 /node_modules/
 /iisnode/

README.md

@@ -142,6 +142,14 @@ There are three main directories in the `ui-react/src/` folder:
     };
     ```
 
+* Alternatively, username, password and domain can be set as environment variable
+
+    ```bash
+    export USERNAME=svcacct_email@domain.com
+    export PASSWORD=password
+    export DOMAIN=domain.com
+    ```
+
 * In `/ui-react/src/config/flightboard.config.js`, manage your customizations:
 
     ```javascript

config/auth.js

@@ -2,10 +2,10 @@
 module.exports = {
   // this user MUST have full access to all the room accounts
   'exchange' : {
-    'username'  : 'SVCACCT_EMAIL@DOMAIN.COM',
-    'password'  : 'PASSWORD',
+    'username'  : process.env.USERNAME || 'SVCACCT_EMAIL@DOMAIN.COM',
+    'password'  : process.env.PASSWORD || 'PASSWORD',
     'uri'       : 'https://outlook.office365.com/EWS/Exchange.asmx'
   },
   // Ex: CONTOSO.COM, Contoso.com, Contoso.co.uk, etc.
-  'domain' : 'DOMAIN.COM'
+  'domain' : process.env.DOMAIN || 'DOMAIN.COM'
 };

server.js

@@ -14,7 +14,7 @@ require('./app/routes.js')(app);
 
 // launch ======================================================================
 //const port = process.env.PORT || 3001;
-const port = 8080;
+const port = process.env.PORT || 8080;
 var theserver = app.listen(port, function(){
 	// call controller functions -------------------------------------------------
 	var io = require('socket.io').listen(theserver);