chore(example): remove cross-env deps

Author: axiaoan

examples/basic/package.json

@@ -4,14 +4,13 @@
   "scripts": {
     "build": "vite-ssr build",
     "dev": "vite-ssr --port 3333",
-    "serve": "cross-env NODE_ENV=production vite-ssr"
+    "serve": "vite-ssr --mode production"
   },
   "dependencies": {
     "vue": "^3.2.31"
   },
   "devDependencies": {
     "@vitejs/plugin-vue": "^2.2.4",
-    "cross-env": "^7.0.3",
     "typescript": "^4.6.2",
     "unplugin-vue-components": "^0.17.21",
     "vite": "^2.8.6",

examples/naive-ui/package.json

@@ -5,7 +5,7 @@
   "scripts": {
     "dev": "vite-ssr --port 3000",
     "build": "vite-ssr build",
-    "serve": "cross-env NODE_ENV=production vite-ssr"
+    "serve": "vite-ssr --mode production"
   },
   "dependencies": {
     "vue": "^3.2.25",
@@ -14,7 +14,6 @@
   "devDependencies": {
     "@css-render/vue3-ssr": "^0.15.9",
     "@vitejs/plugin-vue": "^2.2.0",
-    "cross-env": "^7.0.3",
     "naive-ui": "^2.26.4",
     "typescript": "^4.5.4",
     "unplugin-vue-components": "^0.17.21",