Videx server container to include HEALTHCHECK

### Feature Description and Motivation

A healthcheck can be a useful dependency management technique.

In #79 I've a rather hacked in version using python requests to check its healthy.

It would look better if:
a) it was a script already in the server; and/or
b) (minor) that there was a different healthcheck url; and/or
c) HEALTHCHECK as a container build option referencing the script.

### System Version

Target: Videx server container

### Use Case Scenario

To facilitate ease of use in environments, lets not get user (re)invent their own healthy script mechanisms for videx server.

### Proposed Implementation (Optional)

_No response_

Start with issue #79's existing Python requests health-check approach and inspect the Videx server container build configuration. Clarify whether the intended result is a bundled script, a separate health-check URL, or a container HEALTHCHECK instruction; completion depends on choosing and validating one of these approaches.

Written by the indexing model from the issue text.