I'm relatively new with Magento, but I have already wasted many hours just to install Magento2 with nginx on Ubuntu 18.04 LTS on a cloud, AWS, Gcloud etc... In the end it doesn't work...
The result that I get is a page: Autoload error Vendor autoload is not found. Please run 'composer install' under application root directory.
I did install composer, then I got some missing symfony/mime ^4.3, then everything got f-ed up.
What am I doing wrong? Do you know of any good tutorial on how to Install latest magento with nginx on ubuntu, I tried them all on the first and second page of google and only 2 videos on youtube. None of them worked for me.