add compute1-vm

nixosConfigurations/compute1-vm/default.nix

@@ -0,0 +1,18 @@
+{
+  microvm,
+  lib,
+  ...
+}:
+{
+  imports = [ microvm.nixosModules.microvm ];
+
+  config = {
+    microvm.hypervisor = "qemu";
+
+    # microvm boots the kernel directly; there is no ESP to install a bootloader onto
+    boot.loader.systemd-boot.enable = lib.mkForce false;
+
+    # store optimisation is unsafe on microvm's virtiofs/block-backed store
+    nix.optimise.automatic = lib.mkForce false;
+  };
+}