Laravel Forge - composer.json not found

I am trying to add an existing website to my server, with Laravel Forge. It's a CodeIgniter app and we use Composer.

Inside the repository 'deploy' is not at the top level. We have source code and assets in a folder above this.

But composer.json is inside the deploy directory

When trying to install the site we get the error: Composer could not find a composer.json file in /home/[the project]/[the site]

My project structure is

project/
    source/js/
    source/scss/
    ...
    deploy/
        composer.json
        vendor/
        public/
            index.php

Since Forge deploys from git, can I solve this by:

• Tell it to only deploy the contents of deploy folder, and treat this as the project root?
• Move composer.json up a level to project/ but keep everything else where it is?
• Some other solution?