Moved copy operation in the docker file so that
docker compose is able to better utilize cached images
added proposal to solving hostname problem while being
in container with custom network, or in kubernetes

The two ignored CVEs, "time" RUSTSEC-2020-0071 and
"chrono" RUSTSEC-2020-0159, are considered too hard/ugly
to fix for the moment.

avoid unnecessary double-hex-conversion

zeroize has to be kept at 1.3.0 for now to keep compatibility with
another dependency of the Pod, chacha20poly1305.

Remove the unnecessary uuid dependency along the way

```
thread 'main' panicked at 'there is no reactor running, must be called from the context of Tokio runtime', ~/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.22/src/io/driver/mod.rs:201:9
```

This commit also fixes a cargo-audit warning

Instead, use one chosen indirectly by refinery