Change backend start command to use PORT= instead of --port flag and cargo watch for auto-reload. Install cargo-watch in sandbox container. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Change backend start command to use PORT= instead of --port flag and cargo watch for auto-reload. Install cargo-watch in sandbox container. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>