Fix React dev server not serving outside VM

Vagrantfile

@@ -33,6 +33,7 @@ Vagrant.configure(2) do |config|
   # within the machine from a port on the host machine. In the example below,
   # accessing "localhost:8000" will access port 8000 on the guest machine.
   config.vm.network "forwarded_port", guest: 8000, host: 8000, id: "webserver"
+  config.vm.network "forwarded_port", guest: 3000, host: 3000, id: "reactserver"
 
   # Create a private network, which allows host-only access to the machine
   # using a specific IP.

gulpfile.js

@@ -256,7 +256,7 @@ gulp.task('watch:app', function watch (callback) {
         serverOptions
     )
 
-    server.listen(3000, "localhost", function(err) {
+    server.listen(3000, "0.0.0.0", function(err) {
         if(err) throw new console.PluginError("webpack-dev-server", err);
         // Server listening
         console.log("[webpack-dev-server]", "Running");