Have you had a look at
https://github.com/DNSCrypt/dnscrypt-pr … and-Ubuntu?

There's more information about installation and configuration in the wiki (see right panel on that page)

The versions in the devuan repositories are reasonably up to date (2.0.19 in Beowulf) but you can update to the latest version from Github as long you also get the latest configuration to use the additional features.

If you need more information I run dnscrypt-proxy myself (my version is 2.0.44).