feat: add Docker configuration for consistent test environment

[wenderson-me]

Descrição

Adiciona configuração Docker para ambiente de testes consistente e atualiza documentação.

Alterações

• ✅ Dockerfile - Imagem otimizada com Node.js 20-slim
• ✅ docker-compose.yml - Serviços para testes (all, consumer, provider, dev)
• ✅ .dockerignore - Exclusão de arquivos desnecessários
• ✅ README.md - Documentação dos comandos Docker

Comandos Docker disponíveis

# Executar todos os testes
docker compose run --rm tests

# Executar apenas testes do consumer
docker compose run --rm consumer-tests

# Executar apenas testes do provider
docker compose run --rm provider-tests

# Ambiente de desenvolvimento interativo
docker compose run --rm dev

Testes

• ✅ Consumer tests: 3/3 passando
• ✅ Provider tests: 1/1 passando (3 interações verificadas)
• ✅ Build Docker: ~2.7 min

[Copilot]

Pull request overview

This PR adds Docker configuration to enable consistent testing environments across different development machines. It introduces containerized test execution while maintaining compatibility with existing local development workflows.

Changes:

• Added Docker configuration with optimized Node.js 20-slim image and native build dependencies
• Created docker-compose services for running all tests, consumer-only tests, provider-only tests, and an interactive development environment
• Added comprehensive .dockerignore to exclude unnecessary files from Docker builds
• Added GitHub Actions workflow for automated contract testing on CI/CD
• Updated README with Docker usage instructions

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
Dockerfile	Defines optimized container image with Node.js 20-slim, build dependencies, and test directory structure
docker-compose.yml	Configures four services (tests, consumer-tests, provider-tests, dev) with appropriate volume mounts and commands
.dockerignore	Excludes unnecessary files (node_modules, IDE configs, Docker files, documentation) from Docker builds
README.md	Documents Docker commands for running tests and development environment
.github/workflows/pact-tests.yml	Adds CI/CD workflow for automated contract testing using Node.js 20.x

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[Copilot]

The CMD references "npm test" but there is no "test" script defined in package.json. The available scripts are "test:consumer" and "test:provider". Consider either adding a "test" script to package.json that runs both test commands, or update this CMD to match an existing script like "test:consumer".

Suggested change

	CMD ["npm", "test"]
	CMD ["npm", "run", "test:consumer"]

[Copilot]

The workflow is configured to run on push to branch 'fix/pact-contract-tests', which appears to be a feature/fix branch. For a production workflow, this branch should likely be removed from the trigger list after the PR is merged, leaving only 'main'.

Suggested change

	branches: [main, fix/pact-contract-tests]
	branches: [main]

[Copilot]

The code block is incorrectly marked as 'ruby' when it contains bash/shell commands. Change the language identifier from 'ruby' to 'bash' or 'sh' for proper syntax highlighting.

[Copilot]

Using fixed container_name with 'docker compose run' can cause conflicts if multiple instances are run concurrently. Since the README suggests using 'docker compose run --rm', which creates temporary containers, the container_name directives will prevent running multiple instances simultaneously. Consider removing container_name for all services to allow parallel execution, or document that only one instance can run at a time.