support public-URL, other than "http://localhost:8080"

.env.template

@@ -2,3 +2,4 @@ export USERNAME=
 export PASSWORD=
 export DOMAIN=
 export PORT=
+export PUBLIC_URL=

README.md

@@ -153,12 +153,14 @@ There are three main directories in the `ui-react/src/` folder:
     };
     ```
 
-* Alternatively, username, password and domain can be set as environment variable
+* Alternatively, username, password and domain and public-URL can be set as environment variable. Keep in mind that if
+  a public-URL has been provided, this environment variable already has to be set during the build-lifecycle 
 
     ```bash
     export [email protected]
     export PASSWORD=password
     export DOMAIN=domain.com
+    export PUBLIC_URL=http://meet-easier.domain.com
     ```
 
 * In `/ui-react/src/config/flightboard.config.js`, manage your customizations:

ui-react/src/config/flightboard.config.js

@@ -18,6 +18,6 @@ module.exports = {
   },
 
   'socket' : {
-    'endpoint' : 'http://localhost:8080',
+    'endpoint' : `${process.env.PUBLIC_URL || 'http://localhost:8080'}`,
   }
 };