feat: agregar agente docker para containerización

Nuevo agente para generar Dockerfiles y docker-compose.
Incluye templates para Go, React/Vite, y stacks fullstack.
Soporta desarrollo con hot reload y producción optimizada.

.claude/agents/docker/templates/.dockerignore

@@ -0,0 +1,85 @@
+# Git
+.git
+.gitignore
+.gitattributes
+
+# IDE
+.vscode
+.idea
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Docker
+Dockerfile*
+docker-compose*
+.docker
+
+# Documentation
+*.md
+LICENSE
+docs/
+
+# Environment
+.env
+.env.*
+!.env.example
+
+# Node.js
+node_modules
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# Build outputs
+dist
+build
+out
+*.exe
+*.dll
+*.so
+*.dylib
+
+# Go
+bin/
+vendor/
+*.test
+coverage.out
+coverage.html
+
+# Test
+__tests__
+*.test.ts
+*.test.tsx
+*.spec.ts
+*.spec.tsx
+e2e/
+playwright-report/
+test-results/
+
+# Logs
+logs
+*.log
+
+# Temp
+tmp
+temp
+.tmp
+.temp
+.cache
+
+# CI/CD
+.github
+.gitlab-ci.yml
+.travis.yml
+Jenkinsfile
+
+# Misc
+Makefile
+*.sh
+!entrypoint.sh