You can also look up for these other topics:
Framework
Coding Standards
Boilerplate
CMS
Tool
Security
Hacktoberfest
Automatic CSRF protection for JavaScript apps using a Symfony API
dunglasA simple app skeleton to try to make every components work together : symfony 5.* (latest stable at the date, but work with sf 4 and 3.3+ if you pull the right tag), symfony/flex, webpack-encore, vuej
Rebolon