fix: set NODE_PATH for external module resolution + longer healthcheck

Nitro's rollupConfig.external leaves require('better-sqlite3') in
the bundle, but Node resolves from .output/server/ not /app/.
NODE_PATH=/app/node_modules fixes this. Also increase healthcheck
start-period to 30s with 5 retries.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Dockerfile

@@ -9,8 +9,8 @@ RUN npx nuxt build
 RUN apk del make g++ && rm -rf /root/.cache /tmp/*
 RUN mkdir -p /data && chown node:node /data
 USER node
-ENV NODE_ENV=production
+ENV NODE_ENV=production NODE_PATH=/app/node_modules
 EXPOSE 3000
-HEALTHCHECK --interval=30s --timeout=5s --retries=3 --start-period=15s \
+HEALTHCHECK --interval=10s --timeout=5s --retries=5 --start-period=30s \
   CMD wget -q --spider http://localhost:3000/api/health || exit 1
 ENTRYPOINT ["node", ".output/server/index.mjs"]