DNS failure because lack of privileged container

[aviramha]

A user encountered a case where DNS resolution failed because the agent lacked the privileged flag to access the target container's /etc/resolv.conf.
In this line we just propagate the error, converting it to unknown dns failure error. I'm not sure how we can improve it but it'd be nice if we could check for permission denied then let user know somehow.

mirrord/mirrord/agent/src/dns.rs

Line 71 in 879fd09

let resolv_conf = fs::read(resolv_conf_path).await?;

[meowjesty]

Bit of a better error was added, hopefully it's friendlier to users now.