Server option --redirect-http-from doesn't redirect correctly

I'm using

/opt/solid $ solid -V
5.3.1

from the nodesolidserver/node-solid-server image on docker hub.

The documentation for solid start says:

--redirect-http-from [value] HTTP port or ','-separated ports to redirect to the solid server port (e.g. "80,8080").

If I start the server like this (using the default listen port for https on 8443)

solid start --redirect-http-from 8000

then I get a log message:

nss_1 | Thu, 16 Jul 2020 13:10:25 GMT solid:settings will redirect from port 8000 to port 8443

However, if I make a request to this port over HTTP, I get this:

$ curl -v http://localhost:8000
* Rebuilt URL to: http://localhost:8000/
*   Trying ::1...
* TCP_NODELAY set
*   Trying 127.0.0.1...
* TCP_NODELAY set
* Connected to localhost (127.0.0.1) port 8000 (#0)
> GET / HTTP/1.1
> Host: localhost:8000
> User-Agent: curl/7.54.0
> Accept: */*
>
< HTTP/1.1 302 Found
< X-Powered-By: Express
< Location: https://localhost,8000:8443/
< Vary: Accept
< Content-Type: text/plain; charset=utf-8
< Content-Length: 50
< Date: Thu, 16 Jul 2020 13:10:34 GMT
< Connection: keep-alive
<
* Connection #0 to host localhost left intact
Found. Redirecting to https://localhost,8000:8443/

It seems like this has incorrectly read the parameter when creating the redirect server.

Additionally, from the usage text and the code, it seems like you should be able to add multiple http listen ports:

solid start --redirect-http-from 8000,8080,8888

But I get this as an output:

nss_1 | Thu, 16 Jul 2020 13:15:55 GMT solid:settings will redirect from port 8000,8080,8888 to port 8443

In this case I would expect to get this message 3 times, once for each port.

Start by locating the implementation of the redirect-http-from option and the redirect server setup. Reproduce the commands with one port and comma-separated ports; done means the Location header uses the correct host and target port, and each configured HTTP port is handled separately.