fix : use shx in postinstall

package.json

@@ -14,7 +14,7 @@
     "write-heading-ids": "docusaurus write-heading-ids",
     "format": "npx prettier --write '**/*.{js,jsx,md,mdx,json,css}'",
     "format-check": "npx prettier --check '**/*.{js,jsx,md,mdx,json,css}'",
-    "postinstall": "cp -n .env.example .env"
+    "postinstall": "shx cp -n .env.example .env"
   },
   "dependencies": {
     "@docusaurus/core": "2.4.0",
@@ -28,7 +28,8 @@
   },
   "devDependencies": {
     "@docusaurus/module-type-aliases": "2.4.0",
-    "prettier": "3.0.3"
+    "prettier": "3.0.3",
+    "shx": "^0.3.4"
   },
   "browserslist": {
     "production": [

yarn.lock

@@ -5259,7 +5259,7 @@ [email protected], minimatch@^3.0.4, minimatch@^3.0.5, minimatch@^3.1.1:
   dependencies:
     brace-expansion "^1.1.7"
 
-minimist@^1.2.0, minimist@^1.2.5:
+minimist@^1.2.0, minimist@^1.2.3, minimist@^1.2.5:
   version "1.2.8"
   resolved "https://registry.npmjs.org/minimist/-/minimist-1.2.8.tgz"
   integrity sha512-2yyAR8qBkN3YuheJanUpWC5U3bb5osDywNB8RzDVlDwDHbocAJveqqj1u8+SVD7jkWT4yvsHCpWqqWqAxb0zCA==
@@ -6777,6 +6777,14 @@ shelljs@^0.8.5:
     interpret "^1.0.0"
     rechoir "^0.6.2"
 
+shx@^0.3.4:
+  version "0.3.4"
+  resolved "https://registry.yarnpkg.com/shx/-/shx-0.3.4.tgz#74289230b4b663979167f94e1935901406e40f02"
+  integrity sha512-N6A9MLVqjxZYcVn8hLmtneQWIJtp8IKzMP4eMnx+nqkvXoqinUPCbUFLp2UcWTEIUONhlk0ewxr/jaVGlc+J+g==
+  dependencies:
+    minimist "^1.2.3"
+    shelljs "^0.8.5"
+
 side-channel@^1.0.4:
   version "1.0.6"
   resolved "https://registry.npmjs.org/side-channel/-/side-channel-1.0.6.tgz"