Add yarn command to setup command

Author: pierreburgy

package.json

@@ -9,8 +9,7 @@
     "strapi": "yarn dev --prefix ../strapi/",
     "setup:next": "cd next && yarn && node --loader ts-node/esm ../scripts/copy-env.mts ../next",
     "setup:strapi": "cd strapi && yarn && node --loader ts-node/esm ../scripts/copy-env.mts  ../strapi",
-    "setup": "yarn setup:next && yarn setup:strapi",
-    "postinstall": "yarn setup",
+    "setup": "yarn && yarn setup:next && yarn setup:strapi",
     "dev": "yarn concurrently \"cd strapi && yarn develop\" \"npx wait-on http://localhost:1337 && cd next && yarn dev\"",
     "seed": "cd strapi && yarn strapi import -f ./data/export_20250116105447.tar.gz --force",
     "export": "cd strapi && yarn strapi export --no-encrypt -f ./data/export_20250116105447",