feat: update environment configuration and scripts; add .npmrc, modify .nvmrc, and enhance package.json for development

package.json

@@ -3,10 +3,11 @@
   "version": "1.0.0",
   "main": "App.js",
   "scripts": {
-    "start": "npx expo start",
-    "android": "npx expo run:android",
-    "ios": "npx expo run:ios",
-    "web": "npx expo start --web",
+    "start": "NODE_ENV=development npx expo start",
+    "android": "NODE_ENV=development npx expo run:android",
+    "ios": "NODE_ENV=development npx expo run:ios",
+    "web": "NODE_ENV=development npx expo start --web",
+    "export": "NODE_ENV=production npx expo export",
     "backend": "node ServerFiles/server.js"
   },
   "dependencies": {
@@ -25,7 +26,7 @@
     "expo-secure-store": "~55.0.13",
     "expo-sqlite": "~55.0.15",
     "expo-status-bar": "~55.0.5",
-    "expo-system-ui": "^55.0.15",
+    "expo-system-ui": "~55.0.15",
     "expo-web-browser": "~55.0.14",
     "fuse.js": "^7.1.0",
     "react": "19.2.0",
@@ -40,7 +41,8 @@
   },
   "devDependencies": {
     "@babel/core": "^7.29.0",
-    "babel-preset-expo": "~55.0.17"
+    "babel-preset-expo": "~55.0.17",
+    "yarn": "^1.22.22"
   },
   "overrides": {
     "jscodeshift": "0.16.1",
@@ -51,5 +53,8 @@
     "glob": "^13.0.6",
     "rimraf": "^4.0.0"
   },
+  "engines": {
+    "node": ">=20.0.0"
+  },
   "private": true
 }