feat[server]: add kexec tarball for low-ram bootstrap

hosts/nixos/x86_64-linux/milkywell/default.nix

@@ -0,0 +1,46 @@
+{ lib, config, minimal, ... }:
+{
+  imports = [
+    ./hardware-configuration.nix
+    ./disk-config.nix
+  ];
+  node.lockFromBootstrapping = false;
+  sops = {
+    age.sshKeyPaths = lib.mkDefault [ "/etc/ssh/ssh_host_ed25519_key" ];
+  };
+
+  topology.self = {
+    icon = "devices.cloud-server";
+  };
+
+  networking = {
+    domain = "subnet03112148.vcn03112148.oraclevcn.com";
+    firewall = {
+      allowedTCPPorts = [ 53 ];
+    };
+  };
+
+  system.stateVersion = "23.11";
+
+  swarselsystems = {
+    flakePath = "/root/.dotfiles";
+    info = "VM.Standard.E2.1.Micro";
+    isImpermanence = true;
+    isSecureBoot = false;
+    isCrypted = false;
+    isSwap = true;
+    swapSize = "8G";
+    rootDisk = "/dev/sda";
+    isBtrfs = true;
+    isNixos = true;
+    isLinux = true;
+    server = {
+      inherit (config.repo.secrets.local.networking) localNetwork;
+    };
+  };
+} // lib.optionalAttrs (!minimal) {
+  swarselprofiles = {
+    server = true;
+  };
+
+}