I agree -- It's the same concept but much more efficient. I'd set up a docker to accept a single HTTP post with the document, and to return the thumbnail. The

I agree -- It's the same concept but much more efficient. I'd set up a docker to accept a single HTTP post with the document, and to return the thumbnail. The docker can then be shut down and a new instance spun up to wait for the next document to process. It might be wasteful to spin up a new docker for each instance, but it's the only way to prevent some exploit in LibreOffice[1] that might leak information somehow. A leak could be as terrible as embedding an entire document in the next thumbnail, or as simple as returning the wrong thumbnail (like from a previous request). [1] LibreOffice was the user-agent that phoned home in the article.