Caddyfile

mydomain.duckdns.org/jellyfin/ {
    proxy / localhost:8920 {
        transparent
        websocket
    }
}

mydomain.duckdns.org/heimdall/ {
    proxy / localhost:8888 {
        transparent
        websocket
    }
}

mydomain.duckdns.org/radarr/ {
    proxy / localhost:7878 {
        transparent
        websocket
    }
}