clear logs at start of month

modules/server/caddy.nix

@@ -11,11 +11,35 @@
   };
 
   config = {
-    systemd.services.caddy.serviceConfig.Restart = lib.mkForce "always";
+    systemd = {
+      services = {
+        caddy.serviceConfig.Restart = lib.mkForce "always";
+        clear-caddy-logs = {
+          description = "Delete /var/log/caddy and restart Caddy (monthly)";
+          serviceConfig.Type = "oneshot";
+
+          script = "rm -rf /var/log/caddy";
+          postStop = "systemctl restart caddy";
+        };
+      };
+
+      timers.clear-caddy-logs = {
+        description = "Monthly Caddy log reset";
+        wantedBy = [ "timers.target" ];
+
+        timerConfig = {
+          OnCalendar = "*-*-01 00:00:00";
+          Persistent = true;
+          Unit = "clear-caddy-logs.service";
+        };
+      };
+    };
+
     networking.firewall.allowedTCPPorts = [
       80
       443
     ];
+
     services.caddy = {
       enable = true;
       email = "henry@henryhiles.com";