feat(vesuvio): add acme certificates

systems/vesuvio/certificates.nix

@@ -0,0 +1,25 @@
+{ config, ... }:
+{
+  security.acme = {
+    acceptTerms = true;
+    defaults = {
+      email = "acme@uku.moe";
+      webroot = "/var/lib/acme/acme-challenge";
+    };
+  };
+
+  services.nginx.virtualHosts = {
+    "acme.uku3lig.net" = {
+      serverAliases = [
+        "*.uku3lig.net"
+        "*.uku.moe"
+      ];
+
+      locations."/.well-known/acme-challenge".root = config.security.acme.defaults.webroot;
+    };
+  };
+
+  # /var/lib/acme/acme-challenge must be writable by the ACME user and readable by the Nginx user.
+  # The easiest way to achieve this is to add the Nginx user to the ACME group.
+  users.users.nginx.extraGroups = [ "acme" ];
+}