Not serving up-to-date Javascript

My server is not serving updated JS files; the ones served are not the ones in the code but old ones. I can make changes to HTML okay, but not to JS, so this means the server is responding since I seem some changes. I added a log to test. Then looking in the network tab, I can see the code of the log is not there. I’ve restarted the app itself as well as Nginx with service nginx restart to no avail (many many times)

I know the reset works because the html will update after restart but the JS will not.

I know this is a Digital Ocean problem because I fixed the app locally and it works. I even deleted the app from the server, and cloned a new version with the changes, booted this up but STILL the problem persists.

It says from memory cache in the dev tools but I don’t know what this means. How do I clear the server cache if such a thing exists? How can this persist across deletion of the app?