feat(deploy): add production Dockerfiles and CI/CD pipeline

- Multi-stage Dockerfile for apps/api (NestJS) and apps/web (Next.js standalone)
- Production docker-compose.prod.yml with all services, health checks, and security
- Real deploy.yml pipeline: build → push to GHCR → deploy staging/production
- .dockerignore for optimized build context
- Enable Next.js standalone output mode

Co-Authored-By: Paperclip <noreply@paperclip.ing>

.dockerignore

@@ -0,0 +1,17 @@
+node_modules
+.next
+dist
+*.tsbuildinfo
+.git
+.github
+.husky
+docs
+e2e
+playwright-report
+monitoring
+*.md
+!README.md
+.env*
+.eslintcache
+coverage
+.turbo