fix(nix): add --jitless flag to workaround V8 memory issue

Add --jitless Node.js flag to work around V8 JIT compilation
memory allocation issues on the server.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

nix/landing.nix

@@ -48,7 +48,7 @@ pkgs.buildNpmPackage {
     cat > $out/bin/imphnen-landing <<EOF
     #!${pkgs.bash}/bin/bash
     cd $out/share/landing
-    exec ${pkgs.nodejs_22}/bin/node apps/landing/server.js "\$@"
+    exec ${pkgs.nodejs_22}/bin/node --jitless apps/landing/server.js "\$@"
     EOF
     chmod +x $out/bin/imphnen-landing