Backup over HTTP API

I was looking to execute a backup order over the HTTP API.
Not sure if this is already implemented or not. I will explain my case.

We have an InfluxDB2 inside a Docker Container. We can't relay on Internet as it runs physicaly in the middle of nowhere. But most of the time the host and the container has internet.

We have a Docker Volume where we save the backups. But we would like to force a backup without using SSH, etc... just via the common HTTP API (With the correct permisions token)

Start by checking whether the InfluxDB2 HTTP API already exposes a backup operation and how token permissions are handled. Then review the existing backup behavior for Docker volumes; done would mean a documented, permission-protected way to trigger a backup without SSH.

Written by the indexing model from the issue text.