Какие переменные окружения обязательны?

[Falco]

Установка Render поддерживается их командой, к которой можно обратиться по адресу:

Discourse One-Click Self-Hosting: Quicker and Easier than Official Install

@justin Render will continue to provide full support for this install method. Users can email support@render.com or post in our Discourse community at https://community.render.com. @Falco the price can technically be lower if you select smaller plans for the individual components, but we’ve found that the suggested setup is the lowest price for a production-ready, hassle-free Discourse experience.