Insightful comment! I've faced similar issues when wanting to store an arbitrary amount of data "locally", but usable via a web interface. Because of the vari

Insightful comment! I've faced similar issues when wanting to store an arbitrary amount of data "locally", but usable via a web interface. Because of the various limitations you enumerated, our conclusion was to have a local web server, written in Go, that stores what we need on disk. Then the web application talks over a JSON HTTP API when storing and retrieving.