Fixed prod build setup.

Author: mattmezza

demo/package.json

@@ -5,7 +5,7 @@
   "scripts": {
     "dev": "vue-cli-service serve",
     "build": "vue-cli-service build",
-    "gh:publish": "yarn run build && gh-pages -d dist"
+    "gh:publish": "NODE_ENV=production yarn run build && gh-pages -d dist"
   },
   "dependencies": {
     "node-forge": "^0.10.0",

demo/vue.config.js

@@ -1,4 +1,5 @@
 module.exports = {
   lintOnSave: false,
   productionSourceMap: false,
+  publicPath: process.env.NODE_ENV === 'production' ? '/vue-beautiful-chat/' : '/',
 }