How to cite a website/manual where the authors are (mostly) unknown? For my thesis, I need to cite some pieces of software documentation. The website in question is the documentation of Kubernetes.

I'm fine with using @misc entries in my bibtex file, but obviously I need to fill in the author field.

Usually, when I can't find the author of a specific website, I look up the imprint at the bottom of the page. As the Kubernetes documentation doesn't provide any imprint, there is only © 2017 The Kubernetes Authors or Copyright © 2017 The Linux Foundation® at the bottom of the page.

To me, it looks a little bit odd to have "The Kubernetes Authors" in my bibliography. What should I do?
You can cite using @misc without Author field. To to that, you need to include a key field. Here is an example:

@misc{KubernetesManual2017,
    title = {{Kubernetes Manual}},
    howpublished = "\url{please put the url}",
    year = {2017}, 
    note = "[Online; accessed 04-Dec-2017]",
    key = "KubernetesManual2017",
}