Migrate config from dotfiles

hosts/odyssey/README.md

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+# Odyssey
+
+## Overview
+Primary workstation.
+
+## Specs
+* CPU - Intel Core i7-5930K @ 4.10GHz
+* Chipset - Intel X99
+* Memory - 64 GB DDR4
+* Motherboard - ASUS X99-A
+* GPU - NVIDIA RTX 3090
+* Case - Thermaltake A500
+
+### Disks
+Device | Partitions _(filesystem, size, usage)_
+--- | ---
+Samsung 980 Pro | `/dev/nvme0n1p1` (EFI, 512 MiB, NixOS Boot) <br> `/dev/nvme0n1p2` (ZFS, 2 TiB, NixOS Root)
+
+#### ZFS pool layout
+```
+rpool/
+├── local
+│   ├── nix
+│   └── tmp
+├── system
+│   ├── root
+│   └── var
+└── user
+    └── home
+```
+
+See [Graham Christensen's article](https://grahamc.com/blog/nixos-on-zfs/#datasets) for the motivation behind these datasets.
+
+### Networks
+- DHCP on `10.0.1.0/24` subnet.
+- Tailscale on `100.64.0.0/10` subnet. FQDN: `odyssey.mesh.vimium.net`.