Updates for docker enablement 2

rtl.js

@@ -1,20 +1,17 @@
 const app = require("./app");
+const common = require("./common");
 const debug = require("debug")("node-angular");
 const http = require("http");
 
 const normalizePort = val => {
   var port = parseInt(val, 10);
-
   if (isNaN(port)) {
-    // named pipe
     return val;
   }
-
   if (port >= 0) {
-    // port number
+    common.port = port;
     return port;
   }
-
   return false;
 };
 
@@ -47,8 +44,7 @@ const onListening = () => {
   debug("Listening on " + bind);
 };
 
-const port = normalizePort(process.env.PORT || "3000");
-app.set("port", port);
+const port = normalizePort(process.env.PORT || common.port);
 
 const server = http.createServer(app);
 server.on("error", onError);