That's why blog posts rock. Most popular projects will have a dozen blog posts for different configurations. For example, when looking to set up NextCloud, I found docs for almost all combinations of the following:

• Apache and Nginx configuration
• running through Docker or directly on the host
• MariaDB and Postgres configs (and SQLite, with proper disclaimers)
• Collabora and OnlyOffice config

It does take some knowledge of each of the above if you need one of the few configs that's not available on a blog post, and some of the posts are outdated, but with a bit of searching almost everything is documented by someone on the internet.

This shouldn't be necessary (official docs should be more comprehensive), but at least it's available.