Cache a static file in memory forever on Nginx?
<p>I have Nginx running in a Docker container, and it serves some static files. The files will <em>never</em> change at runtime - if they actually do change, the container will be stopped, the image will be rebuilt, and a new container will be started.</p>

<p>So, to improve performance, it would be perfect if Nginx would read the static files only one single time from disk and then server it from memory forever. I have found some configuration options to configure caching, but at least from what I have seen none of them provided this "forever" behavior that I'm looking for.</p>

<p>Is this possible at all? If so, how do I need to configure Nginx to achieve this?</p>