chore: dynamic hosts, builder targets

Make hosts read from directories, to limit manual changes
Rename vm-gitlab -> gitlab
A few reformatting and lint changes due to altered files
Create builder targets for Darwin builders

hosts/unstable/icdm-root/networking.nix

@@ -0,0 +1,63 @@
+{ ... }:
+let
+  dnsHosts = builtins.concatStringsSep "\n" [ "wiki.icdm.lan 10.42.101.1" ];
+in
+{
+  # If we have to do proxying in Bayonnais, we can start to work on that here
+  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
+  networking = {
+    hostName = "icdm-root";
+    useDHCP = false;
+    defaultGateway = "10.42.1.1";
+    nameservers = [
+      "100.100.100.100"
+      "10.42.1.2"
+    ];
+    enableIPv6 = false;
+
+    interfaces = {
+      eno1.ipv4.addresses = [
+        {
+          address = "10.42.101.1";
+          prefixLength = 16;
+        }
+        {
+          address = "10.77.1.2";
+          prefixLength = 16;
+        }
+      ];
+    };
+    # Allow traffic through
+    firewall = {
+      enable = true;
+      allowedTCPPorts = [ 53 ];
+      allowedUDPPorts = [
+        53
+        67
+      ];
+    };
+
+    extraHosts = "${dnsHosts}";
+  };
+
+  services.dnsmasq = {
+    enable = true;
+    settings = {
+      domain = "icdm.lan";
+      dhcp-range = [ "eno1,10.77.1.10,10.77.1.255,255.255.0.0,12h" ];
+      dhcp-option = [
+        "eno1,option:router,10.77.1.1"
+        "eno1,option:dns-server,10.77.1.2,1.1.1.1"
+        "eno1,option:domain-search,icdm.lan"
+      ];
+      expand-hosts = true;
+      log-dhcp = true;
+      log-queries = true;
+      # Upstream servers
+      server = [
+        "1.1.1.1"
+        "8.8.4.4"
+      ];
+    };
+  };
+}