EdPaper
EdPaper is a laravel-php driven Document organizer made for PDFs. They are stored on your server (unencrypted, beware !) You'll need composer and PHP (5 or 7).
Run a composer install/php composer install(depends of your configuration) within the app root path (you'll need composer)
Rename .env.example to .env and run php artisan key:generate from the app's root path.
Open .env and fill it with your database details and your Google's reCaptcha site and secret key (otherwise users won't be able to register).
Run php artisan migrate from the app's root path, and you're all done.
You just have to create an apache/nginx vhost (site root must me the public folder).