What is the URL of the page with the issue?

https://pkg.go.dev/net/http#DetectContentType

What is your user agent?

Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:95.0) Gecko/20100101 Firefox/95.0

What did you do?

I used http.DetectContentType with this uploaded LibreOffice files.

buff, err := file.Open()
head := make([]byte, 512)
_, err = buff.Read(head)
contentType = http.DetectContentType(head)

What did you expect to see?

LibreOffice Files MIME type.

What did you see instead?

Zip MIME type.

Could you add OpenDocument MIME type to http.DetectContentType, like https://github.com/gabriel-vasile/mimetype do?