Add mediainfo to distroless images

[lilws]

When access mediainfo for rtorrent, it can't spawn mediainfo and show error like this:

In flood:latest everything works fine. Today I tried distroless for lightweight version and find this happen. I setup distroless the same way with flood latest on docker.

[jesec]

This is a known deficiency. I am moving this issue to discussions.

I will have to figure out a way to compile a fully static mediainfo, or use a WebAssembly version (which can be bundled into Flood).