fix: fix root start script (#5032)

Fixes #5022

See https://nx.dev/recipes/running-tasks/root-level-scripts#setup

packages/twenty-docs/docs/start/local-setup/troubleshooting.mdx

@@ -24,11 +24,11 @@ If you don't, make sure you don't have more than one postgres instance running o
 
 ## Cannot find module 'twenty-emails' or its corresponding type declarations.
 
-You have to build the package `twenty-emails` before running the initialization of the database with `yarn nx run twenty-emails:build`
+You have to build the package `twenty-emails` before running the initialization of the database with `npx nx run twenty-emails:build`
 
 ## Missing twenty-x package
 
-Make sure to run yarn in the root directory and then run `yarn nx server:dev twenty-server`. If this still doesn't work try building the missing package manually.
+Make sure to run yarn in the root directory and then run `npx nx server:dev twenty-server`. If this still doesn't work try building the missing package manually.
 
 ## Lint on Save not working
 

packages/twenty-docs/docs/start/local-setup/yarn-setup.mdx

@@ -182,7 +182,7 @@ yarn
 
 Setup your database with the following command:
 ```bash
-yarn nx database:reset twenty-server
+npx nx database:reset twenty-server
 ```
 
 Start the server and the frontend: