mv logo in dist folder

package.json

@@ -8,7 +8,7 @@
     "start": "NODE_ENV=production node server.js",
     "dev": "webpack-dev-server",
     "uncss": "uncss --stylesheets dist/lesspass.css index.html > dist/lesspass.uncss.css",
-    "build": "rm -rf dist && NODE_ENV=production webpack && npm run uncss && rm dist/lesspass.css*",
+    "build": "rm -rf dist && NODE_ENV=production webpack && npm run uncss && rm dist/lesspass.css* && cp src/logo.png dist/",
     "prepublish": "npm run build"
   },
   "repository": {