feat(gs/system): Enable docker on dev machines

This was locked away in the urbint-specific module, but I use it
elsewhere.

Change-Id: Ifced2196dc22a9dbed74a18d4e1fed9488eb0e26
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2152
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI

users/glittershark/system/system/machines/chupacabra.nix

@@ -9,6 +9,7 @@
     ../modules/rtlsdr.nix
     ../../../../../ops/nixos/v4l2loopback.nix
     ../modules/desktop.nix
+    ../modules/development.nix
   ];
 
   hardware.enableRedistributableFirmware = true;

users/glittershark/system/system/modules/development.nix

@@ -0,0 +1,5 @@
+{ config, lib, pkgs, ... }:
+
+{
+  virtualisation.docker.enable = true;
+}