Set NODE_ENV to production for build step

Author: mdedys

package.json

@@ -12,7 +12,7 @@
     "protoc_version": "3.15.8"
   },
   "scripts": {
-    "build": "webpack",
+    "build": "NODE_ENV=production webpack",
     "dev": "webpack --watch --stats-error-details",
     "test": "mocha --reporter spec",
     "update-protos": "sh scripts/update_protos.sh  ${npm_package_config_lnd_release_tag} ${npm_package_config_loop_release_tag} ${npm_package_config_pool_release_tag} ${npm_package_config_faraday_release_tag}",