- Dockerfile: add COPY db/ /app/db/ so migrations are available at runtime (server/src/db.js requires ../../db/migrations at startup) - vite.config.js: fix dev proxy port from 3001 to 3000 to match server's default PORT Docker build passes; server starts and connects to DB correctly. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>