NODE_ENV (build-dependent) development: modules are bundled as is production: modules are minified and uglified PWA_ENV (build-dependent) development: configs are obtained from /config/development.js production: configs are obtained from /config/production.js customPwaEnv: configs are obtained from /config/customPwaEnv.js PWA_PUBLIC_PATH (build-dependent) /build/client/: assets are fetched from th