Magento installation custom extension not recognised

I added an extension to a new magento 2 digital ocean droplet. But when I run setup upgrade the extension is not added to app\etc\config.php. I’ve added a folder in app called tomispepe and added a folder in it called checkout.

these are my files: /var/www/html/magento/app/tomispepe/checkout/registration.php <?php \Magento\Framework\Component\ComponentRegistrar::register( \Magento\Framework\Component\ComponentRegistrar::MODULE, ‘tomispepe_checkout’, DIR );

the module xml is here: /var/www/html/magento/app/tomispepe/checkout/etc/module.xml <?xml version=“1.0”?> <config xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance” xsi:noNamespaceSchemaLocation=“urn:magento:framework:Module/etc/module.xsd”> <module name=“tomispepe_checkout” setup_version=“1.0.0”/> </config>

that’s it.

Then I ran: ./bin/magento cache:flush ./bin/magento setup:upgrade

then this should have included my new extension cat app/etc/config.php | grep tom but it did not!

in my dev env this works but on my droplet it does not. There must be something unique about my droplet. Please help.