`npm start` not work as expected

[bruceauyeung]

os: centos 7 x64 electron version:

[root@host-10-114-51-177 electron-typescript-vue-starter-master]# electron -v v5.0.6

chromium is installed:

[root@host-10-114-51-177 electron-typescript-vue-starter-master]# which chromium-browser alias chromium-browser='chromium-browser --no-sandbox' /usr/bin/chromium-browser

use npm to install node modules:

[root@host-10-114-51-177 electron-typescript-vue-starter-master]# npm install

[email protected] postinstall /root/electron-typescript-vue-starter-master/node_modules/electron node install.js

npm WARN [email protected] No repository field. npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules/fsevents): npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

added 917 packages from 524 contributors in 57.074s

npm start runs without error but i expect an electron window is opened.

[root@host-10-114-51-177 electron-typescript-vue-starter-master]# npm start

[email protected] start /root/electron-typescript-vue-starter-master electron-forge start

✔ Checking your system ✔ Locating Application ✔ Preparing native dependencies ✔ Compiling Main Process Code ✔ Launch Dev Servers ✔ Compiling Preload Scripts ✔ Launching Application

Webpack Output Available: http://localhost:9000

i tried to open http://localhost:9000 using firefox but got error unable to connect