Packing and deploying Symfony web site

I'm new to Symfony, coming from .NET world. Using Symfony (4) documentation, I managed to create simple web site. Now I want to put it to live, but I'm struggling to find any useful information what should I do in order to "pack" everything necessary and deploy it. Indeed, there's page describing deployment (How to Deploy a Symfony Application), but I find it lacking information about:

• what to include/exclude (obviously I don't want to pack dev dependencies, and deploying composer files also doesn't seems to make any sense)
• what to change (there's .env file - containing APP_ENV and APP_SECRET - where do I use those values?)
• my hosting uses folder www for public presentation, do I have to change/configure something before renaming public directory just to www?
• do I have to configure .htaccess to not route images/css/js trough PHP?

My current project structure is:

+ bin
+ config
+ public
  + css
  - index.php
+ src
  + Controller
  - Kernel.php
+ templates
+ var
+ vendor
- .env
- composer.json
- composer.lock
- symfony.lock

from Packing and deploying Symfony web site