How to correctly run composer update to update the project in the folder?

Question

Composer

The bottom line is, there is a project: /www/project it contains
composer.json

composer create-project --prefer-dist yiisoft/yii2-app-basic mysite

Now I have a project /www/project/mysite which contains my composer.json
How can I now update the dependencies in both the root folder and the project folder with one command?
When I create a docker container, I have the command: composer update, but only what is written in the first composer.json is updated.

Answer 1

run composer update in composer.json folder which is root. It will pull up and update all dependencies and dependencies of dependencies, etc.