Add the previous button on the install page

Is your enhancement request related to a problem? Please describe

The installation interface only has a "Next" button and does not have a "Previous" button. When I realized that I had made a configuration mistake, I was unable to go back to the previous step to modify the settings I had already configured.

Describe the solution you'd like

Add the previous button on the install page.

Describe alternatives you've considered

none

For security reasons, the config.yaml file cannot be modified after it has been created.

You can delete it and reinstall it.