fix: better command

docs/ecolyo/technical/launch_local_application.md

@@ -129,7 +129,8 @@ You can change the period of data generated by changing the following lines:
 Next launch the script `createDayDataFiles.js` available into the `scripts` folder
 
 ```sh
-node scripts/createDayDataFiles.js
+cd scripts
+node createDayDataFiles.js
 ```
 
 Json files with data will be created into `scripts/data` folder.