Invoice Ninja

  $ wget https://download.invoiceninja.com/ninja-v3.3.0.zip
  $ unzip ninja*.zip
  $ cd ninja
  $ sudo chmod -R 755 storage
  $ sudo chown -R www-data:www-data storage bootstrap public/logo

  $ psql
  ~$ CREATE DATABASE ninja;
  ~$ CREATE USER 'ninja'@'localhost' IDENTIFIED BY 'ninja';
  ~$ GRANT ALL PRIVILEGES ON * . * TO 'ninja'@'localhost';