A lot of developers are helping the community by making their source code public or publishing packages to npm or something like that. Are there other ways to help? Like helping to find a bug, discussing about how to setup an application for a certain use case or anything like that? Answering questions on Stack overflow is an example but is that the best way?
Which community? This is an extremely abstract and large scale question as asked lol.
I think a good way to help the open source community is to fix bugs you find in software and documentation you use that you’re capable of fixing. Open source work is extremely easy to get burnt out on. A pull request with a fix for a well documented problem is infinitely better than just a bug report of a well documented problem (which itself is infinitely better than a badly documented bug report).