chore: put acme configuration in own file

acme.nix

@@ -0,0 +1,16 @@
+{ base-domain, ... }:
+{
+  security.acme = {
+    certs.${base-domain}.extraDomainNames = [
+      "${base-domain}"
+      "sourcehut.${base-domain}"
+      "meta.sourcehut.${base-domain}"
+      "git.sourcehut.${base-domain}"
+    ];
+    acceptTerms = true;
+    defaults = {
+      email = "khais.colin+letsencrypt@gmail.com";
+      dnsProvider = "namecheap";
+    };
+  };
+}

configuration.nix

@@ -3,6 +3,7 @@
   imports = [
     ./hardware-configuration.nix
     ./firewall.nix
+    (import ./acme.nix { base-domain = "005540.xyz"; })
     ./userprogs.nix
     ./sourcehut.nix
   ];

sourcehut.nix

@@ -43,19 +43,6 @@ in
     };
   };
 
-  security.acme = {
-    certs.${base-domain}.extraDomainNames = [
-      "${fqdn}"
-      "meta.${fqdn}"
-      "git.${fqdn}"
-    ];
-    acceptTerms = true;
-    defaults = {
-      email = "khais.colin+letsencrypt@gmail.com";
-      dnsProvider = "namecheap";
-    };
-  };
-
   services.nginx = {
     enable = true;
     recommendedTlsSettings = true;