add wynne-deploy service to build site on restart

hosts/lab/wynne.nix

@@ -2,6 +2,14 @@
 let
   port = 4322;
   dataDir = "/srv/wynne";
+
+  deployScript = pkgs.writeShellScript "wynne-deploy" ''
+    set -e
+    cd ${dataDir}/repo
+    ${pkgs.git}/bin/git pull
+    ${pkgs.pnpm}/bin/pnpm install --frozen-lockfile
+    ASTRO_DB_REMOTE_URL=file:${dataDir}/data/guestbook.db ${pkgs.pnpm}/bin/pnpm build
+  '';
 in
 {
   services.caddy.virtualHosts."wynne.rs" = {
@@ -17,9 +25,19 @@ in
     '';
   };
 
+  systemd.services.wynne-deploy = {
+    description = "Build wynne.rs from source";
+    serviceConfig = {
+      Type = "oneshot";
+      User = "lew";
+      ExecStart = deployScript;
+    };
+  };
+
   systemd.services.wynne = {
     description = "wynne.rs";
-    after = [ "network.target" ];
+    after = [ "network.target" "wynne-deploy.service" ];
+    requires = [ "wynne-deploy.service" ];
     wantedBy = [ "multi-user.target" ];
     environment = {
       HOST = "127.0.0.1";