Fix package json next firebase issues

Author: rvsia

packages/react-renderer-demo/package.json

@@ -3,14 +3,14 @@
     "version": "4.0.1",
     "description": "Host Next.js SSR app on Firebase Cloud Functions with Firebase Hosting redirects.",
     "engines": {
-        "node": ">=8"
+        "node": "10"
     },
     "scripts": {
     "dev": "next \"src/app/\"",
     "preserve": "npm run build-public && npm run build-funcs && npm run build-app && npm run copy-deps && npm run install-deps",
     "serve": "cross-env NODE_ENV=production firebase serve",
     "predeploy": "npm run build-public && npm run build-funcs && npm run build-app && npm run copy-deps",
-    "deploy": "firebase deploy",
+    "deploy": "NODE_ENV=production firebase deploy",
     "clean": "rimraf \"dist/functions/**\" && rimraf \"dist/public\"",
     "build-public": "cpx \"src/public/**/*.*\" \"dist/public\" -C",
     "build-funcs": "babel \"src/functions\" --out-dir \"dist/functions\"",

packages/react-renderer-demo/src/app/package.json

@@ -72,6 +72,6 @@
     "react-router-dom": "^5.0.1"
   },
   "engines": {
-    "node": ">=8"
+    "node": "10"
   }
 }