docs: added a note about using Yarn for installation (#2778)

* docs: added a note about yarn being faster

* docs: fixed env variable used in admin deployment guide

* docs: fixed the use of noReport with npm2yarn

docs/content/troubleshooting/transaction-error-in-checkout.md

@@ -46,7 +46,7 @@ medusa migrations run
 
 If you want to add demo data into your server, you should also seed the database using the following command:
 
-```bash npm2yarn noReport
+```bash npm2yarn
 npm run seed
 ```