Unable to connect to host service from inside Docker container

I’m unsure of the exact technology used for containerization, but my host machine is a VPS running on Oracle’s OCI plaftorm. Fastfetch labels my host as KVM Virtual Machine (virt-4.2), so it’s definitely running under some sort of virtualization technology.

Running curl 172.17.0.1:9090 on the host returns nothing, however looking at the logs of the application I can see a valid HTTP GET request reaching the server. The exact response from the server logs are:

2025.01.09 14:11:40:0000 [io-comp...] [INFO ] org.http4s.server.middleware.Logger - HTTP/1.1 GET /
2025.01.09 14:11:40:0001 [io-comp...] [INFO ] org.http4s.server.middleware.Logger - HTTP/1.1 303 See Other