doc: move the ulimit fix to the README file

Author: alexsavio

README.md

@@ -12,3 +12,16 @@ Check the Justfile for the commands to run the project.
 - [ ] Add validation on the incoming token, we are currently passing the raw user input straight into a query (thanks sqlx for protecting us from SQL injections <3);
 - [ ] Use a proper templating solution for our emails (e.g. tera);
 - [ ] Anything that comes to your mind!
+
+
+## Troubleshooting
+
+### Too many open files when running tests
+
+On MacOS, you may encounter the error `Too many open files` when running tests. This is because the default limit of open file descriptors is too low. You can increase the limit by running the following command:
+
+```sh
+ulimit -n 2048
+```
+
+Reference: https://github.com/WeareJH/config-gen/issues/44

justfile

@@ -89,8 +89,3 @@ migrate-do dbconnection:
 ## Update sqlx offline mode
 sqlx-prepare:
   cargo sqlx prepare --workspace
-
-## MacOS - fix ulimit
-# https://github.com/WeareJH/config-gen/issues/44
-fix-ulimit:
-  ulimit -n 2048