I don't know much about QNAP, seems to be a storage specific device, but I would think that you could extract to wherever the installation could be read by a webserver?
You might have to tell us other details to assist, if there's more to it than that.
There used to be a QNAP package for webERP, however they pulled it as the version had some bugs which had been fixed in the code, but the package wasn't updated. I had some discussions with their product manager last year, and he was asking if we could produce a new .qpkg package. I had a look into it, but without access to QNAP hardware it wasn't a task I felt able to take on.