clouvider-lon01: add ZNC

ops/nixos/clouvider-lon01/default.nix

@@ -106,6 +106,10 @@ in {
       ipv6.addresses = [{ address = "2a0a:54c0:0:17::2"; prefixLength = 126; }];
     };
     firewall.allowPing = true;
+    firewall.allowedTCPPorts = [
+      80 443  # HTTP/nginx
+      6697  # znc
+    ];
   };
   my.ip.tailscale = "100.79.173.25";
 
@@ -124,6 +128,11 @@ in {
   users.users = {
     lukegb.extraGroups = [ "bird2" ];
   };
+  users.groups = {
+    znc-acme = {
+      members = [ "znc" "nginx" ];
+    };
+  };
 
   services.lukegbgp = let local = {
     asn = 205479;
@@ -152,5 +161,34 @@ in {
     };
   };
 
+  services.znc = {
+    enable = true;
+    mutable = true;
+    dataDir = "/persist/etc/znc";
+    useLegacyConfig = false;
+  };
+  security.acme = {
+    acceptTerms = true;
+    email = "letsencrypt@lukegb.com";
+    certs."znc.lukegb.com" = {
+      webroot = "/var/lib/acme/.challenges";
+      group = "znc-acme";
+      extraDomainNames = ["akiichiro.lukegb.com"];
+    };
+  };
+  services.nginx = {
+    enable = true;
+    virtualHosts = {
+      "clouvider-lon01.as205479.net" = {
+        locations."/.well-known/acme-challenge" = {
+          root = "/var/lib/acme/.challenges";
+        };
+        locations."/" = {
+          return = "301 https://$host$request_uri";
+        };
+      };
+    };
+  };
+
   system.stateVersion = "20.09";
 }