Migrate dns part

README.md

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+## DNS records for serguzim.net
+
+### Get started
+
+- install [DNSControl](https://dnscontrol.org/) (direnv and shell.nix should help)
+- create credentials for ovh: [Control panel - OVHcloud](https://www.ovh.com/auth/api/createToken?GET=/domain/zone/*&POST=/domain/zone/*&PUT=/domain/zone/*&DELETE=/domain/zone/*&GET=/domain/*&POST=/domain/*&PUT=/domain/*&POST=/domain/*/nameServers/update)
+  - alternative: follow instructions on dnscontrol: [OVH | DNSControl](https://docs.dnscontrol.org/provider/ovh#activation)
+- enter credentials to ovh in .env file (copy from .env.example)
+- check credentials with `make dns-check`
+- run `make dns`