add hetzner-dns for intranet challenges

hosts/sid/secrets/secrets.yaml

@@ -32,6 +32,7 @@ mailserver:
         vaultwarden: ENC[AES256_GCM,data:nSiiyurI0pNGlJiHpgu5jUQIq688IbPKlJCvx4jrFN9TwIY+kfVOaO4KWKkavBYfMZqMuEBr7EAdRULS,iv:OpgfXl1uYLgjOGDTkXFj/wPFUoE6uK89gtXLsB2x6gE=,tag:knJkNQnRCNcc/2nKBYdVCw==,type:str]
 radicale:
     sid: ENC[AES256_GCM,data:/OgIrXnGttIymGw98feiUjKPOIlrgRIC0TNCdBnuJOiA0RzbF0b9SMVzwEZiTEmS82g2lSvxQkE4kZjeOgOC0RLvCyZAmtWojq+g1pN0qhEkhwH0Qtu9wNnSYHuRqh2E5nWzHNGl/eF6zQ==,iv:5XtlyXjpB+XrVvJ7IoM7Gu63xA8vYrcJjUjLPmOMAIU=,tag:SAuYl/wzxnINyVWn9nI5yA==,type:str]
+hetzner-dns-api-key: ENC[AES256_GCM,data:KQooOZjQMtCSVqMI8yKVEk0xebTEuNs5WsxTDC9kcXdGZIgq8ZIEk5ku94EV95i0ad9y5Zx0ozt7aWcNHiMMfQ==,iv:jssQ7PejT5awmeMowdSIEFKDfLW7PWvsd++lh9/MlXs=,tag:UoNRz9neDzDxDjmGmBNPjA==,type:str]
 sops:
     age:
         - recipient: age19yeqvv28fgrtk6jsh3xyaf0lch86kna6rcz4dwe962yyyyevu30sx474xy
@@ -52,7 +53,7 @@ sops:
             RzhnczA0S1pxcXZncGpWVHNYQW96L28K+ytH3PPyg4+wibpAQhp02RiSfZ83EDRB
             UJ8UV1d+51D0e2A1sI95r2AzDj4jfwUnI+LYDPC/qEpsu5LFLGVyeg==
             -----END AGE ENCRYPTED FILE-----
-    lastmodified: "2026-04-03T11:37:47Z"
-    mac: ENC[AES256_GCM,data:5f4/mIJzzvKhZjES4WA0Ds2g642FDS03oSmH4dUi0pnF01aQD75eZ0HI3vcdks6kY+b5xyH5BJ283cgrnIiG2oPjYsIt8ULFnXZql31QQJArirYC35qf5lIiN4gC0ObzC5nSTR4rzrqpWtmf2vrvxDXWftK+JdwPyPjk/4IAu50=,iv:tfHDum7KB+nYQnxfukm+w/BotWW+Itmn11yy6O4V6oE=,tag:0/sFkH9Z2ZP2wzVfJEYFqA==,type:str]
+    lastmodified: "2026-04-03T13:35:11Z"
+    mac: ENC[AES256_GCM,data:fUOfIHeXjpDe57Q5sTYFlAefk1JpX2uvwmgpr9Mvl7pH47NBJUnQjC2NH5e89gc08H91ZYD8T4xE2e/E0zBb4rnW6geVpTPfV7NTj/HPOpRZCj/4ikMv/u6cFDODSThTRRRm4rBhFv2jpNR9Ez50OxOxbOGXILEAaQ1yytyVQKs=,iv:5F85fPxdab1KKHN978stzLhFTOH811+qwFZ0mP13Dx0=,tag:euM1ecdQX1d5L9ViZZknQw==,type:str]
     unencrypted_suffix: _unencrypted
     version: 3.12.1

hosts/sid/services/headscale.nix

@@ -1,6 +1,5 @@
 {
   inputs,
-  constants,
   ...
 }:
 
@@ -10,32 +9,6 @@
     inputs.synix.nixosModules.headscale
   ];
 
-  services.resolved.enable = false;
-  networking.resolvconf.enable = false;
-
-  networking.nameservers = [ constants.hosts.sid.ip ];
-
-  services.coredns = {
-    enable = true;
-    config = with constants; ''
-      .:53 {
-        bind ${hosts.sid.ip}
-        hosts {
-          ${hosts.rx4.ip} ${services.vaultwarden.fqdn}
-          ${hosts.rx4.ip} ${services.webdav.fqdn}
-          ${hosts.rx4.ip} rx4.tail
-          ${hosts.sid.ip} sid.tail
-          ${hosts.vde.ip} vde.tail
-          fallthrough
-        }
-        forward . 1.1.1.1
-        cache
-        log
-        errors
-      }
-    '';
-  };
-
   services.headplane = {
     enable = true;
     reverseProxy = {

hosts/sid/services/nginx.nix

@@ -1,6 +1,7 @@
 {
   inputs,
   constants,
+  config,
   lib,
   ...
 }:
@@ -15,6 +16,41 @@ in
     inputs.synix.nixosModules.nginx
   ];
 
+  services.resolved.enable = false;
+  networking.resolvconf.enable = false;
+
+  networking.nameservers = [ constants.hosts.sid.ip ];
+
+  services.coredns = {
+    enable = true;
+    config = with constants; ''
+      .:53 {
+        bind ${hosts.sid.ip}
+        hosts {
+          ${hosts.rx4.ip} ${services.vaultwarden.fqdn}
+          ${hosts.rx4.ip} ${services.webdav.fqdn}
+          ${hosts.rx4.ip} rx4.tail
+          ${hosts.sid.ip} sid.tail
+          ${hosts.vde.ip} vde.tail
+          fallthrough
+        }
+        forward . 1.1.1.1
+        cache
+        log
+        errors
+      }
+    '';
+  };
+
+  security.acme = {
+    certs."${constants.intranet}" = {
+      domain = "*.${constants.intranet}";
+      dnsProvider = "hetzner";
+      credentialsFile = config.sops.secrets.hetzner-dns-api-key.path;
+    };
+  };
+  sops.secrets.hetzner-dns-api-key = { };
+
   services.nginx = {
     enable = true;
     openFirewall = true;