add documentation generators

[rafaelcr]

• Fastify OpenAPI generator using FastifySwagger to generate an openapi.yaml and openapi.json files
• Docs generator using redoc-cli
• Vercel build generator

[blockstack-devops]

🎉 This issue has been resolved in version 1.2.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀