bartoc.org deployment: Handle proxying of bartoc.org/api in Apache

[stefandesu]

In order to improve uptime and make access to BARTOC's underlying API a bit more reliable, we should handle the proxying of /api to the backend JSKOS server installation via our Apache web server. Even if BARTOC went down, its API would still be accessible. However, the internal proxying should stay so that the application is not dependent on configuration of an external web server.

Related to gbv/cocoda#670.

[stefandesu]

Since we're not using Apache anymore, but nginx-proxy, we will need this option: https://github.com/nginx-proxy/nginx-proxy/tree/main/docs#multiple-ports-routed-to-same-hostname-and-different-paths

I will test this out and deploy it if it works as expected.

[stefandesu]

Done!