Add production NODE_ENV for build scripts

Author: colinrotherham

package.json

@@ -52,9 +52,9 @@
   ],
   "scripts": {
     "cleanup": "rm -rf dist/ > /dev/null",
-    "build": "yarn cleanup && rollup -c",
+    "build": "NODE_ENV=production yarn cleanup && rollup -c",
     "storybook": "NODE_ENV=development storybook dev -p 6006",
-    "build-storybook": "storybook build",
+    "build-storybook": "NODE_ENV=production storybook build",
     "test": "jest",
     "test:watch": "jest --watch",
     "lint": "yarn lint:types && yarn lint:js && yarn lint:prettier",