set working dir for systemd service

flake.nix

@@ -83,6 +83,7 @@
             description = "zineshop daemon";
             serviceConfig = {
               Type = "simple";
+              WorkingDirectory = "/var/lib/zineshop";
               ExecStart = pkgs.writeScript "start-zineshop" ''
                 #! ${pkgs.bash}/bin/bash
                 PATH="$PATH:${lib.makeBinPath [ pkgs.poppler_utils ]}"
@@ -101,9 +102,9 @@
 
             preStart = ''
               mkdir -m 0770 -p "/var/lib/zineshop"
-              chown zineshop:zineshop "/var/lib/zineshop"
               cp -r ${zineshop-pkg}/views /var/lib/zineshop/
               cp -r ${zineshop-pkg}/static /var/lib/zineshop/
+              chown zineshop:zineshop "/var/lib/zineshop"
             '';
 
             wantedBy = [ "default.target" ];