• Cleans up the output /build directory (clean.js)
• Copies static files to the output folder (copy.js)
• Launches Webpack compiler in a watch mode (via webpack-middleware)
• Launches Node.js server from the compiled output folder (runServer.js)
• Launches Browsersync and Hot Module Replacement

• Cleans up the output /build folder (clean.js)
• Copies static files to the output folder (copy.js)
• Creates application bundles with Webpack (bundle.js, webpack.config.js)

• Builds the project from source files (build.js)
• Pushes the contents of the /build folder to a remote server with Git

For example:

$ yarn run build --release --verbose      # Build the app in production mode

or

$ yarn start --release                    # Launch dev server in production mode

• webpack.config.js - Webpack configuration for both client-side and server-side bundles
• postcss.config.js - PostCSS configuration for transforming styles with JS plugins
• run.js - Helps to launch other scripts with babel-node (e.g. babel-node tools/run build)
• .eslintrc - ESLint overrides for built automation scripts