CI/CD pipeline setup

Vytvoř CI/CD pipeline pro [PROJECT]. Platform: [GITHUB ACTIONS/GITLAB CI/JENKINS].\n\n**Pipeline Stages:**\n\n**1. Build:**\n- Install dependencies\n- Compile/build\n- Cache strategy\n\n**2. Test:**\n- Unit tests\n- Integration tests\n- E2E tests (optional)\n- Coverage report\n\n**3. Quality:**\n- Linting\n- Code formatting\n- Security scanning\n- Type checking\n\n**4. Deploy:**\n- Staging: auto-deploy on [BRANCH]\n- Production: manual approval + deploy on [BRANCH]\n- Rollback strategy\n\n**Configuration:**\n- Environment variables\n- Secrets management\n- Notification (Slack/email on failure)\n- Parallel jobs\n\n**Triggers:**\n- On push to: [BRANCHES]\n- On PR: [ACTIONS]\n- On schedule: [CRON]\n\nStack: [STACK]. Deployment: [PLATFORM - AWS/Vercel/Railway].