1. install package npm i -D @babel/cli @babel/core @babel/preset-env babel-loader clean-webpack-plugin copy-webpack-plugin core-js cross-env html-webpack-plugin source-map-loader terser-webpack-plugin webpack webpack-cli webpack-dev-server npm i three 2. run server npm start 3. build (for release) npm run build -> if error in command "npm start" or "npm run build", retry with changed node LTS version. n lts -> ERROR in unable to locate 'something...' If the above error occurs, please check if there is a file set in CopyWebpack Plugin in webpack.config.js. If you don't need CSS or an image folder, please annotate the entire CopyWebpackPlugin part in webpack.config.js.