Specify build host and directory in the makefile

Makefile

@@ -1,4 +1,7 @@
+DIR=$(HOME)/Projects/zion
+
 switch:
-	nixos-rebuild switch --fast --target-host root@zion --flake path://$(PWD)#zion
+	nixos-rebuild switch --fast --target-host root@zion \
+	--build-host root@zion --flake path://$(DIR)#zion
 
 .DEFAULT_GOAL := switch

modules/periodic.nix

@@ -61,6 +61,7 @@ in {
       systemctl restart syncthing
       systemctl restart radicale
       systemctl restart gitea
+      systemctl restart podman-openbooks
     '';
     serviceConfig.Type = "oneshot";
     requires = [ "sata-hat.service" ];