Update CLI Versions

• Bump the Node Alpine Version to (21-alpine.3.18) OpenAPI CLI Version to (1.9.0)

Update CLI Versions

• Bump the Node Alpine Version to (17.7.1-alpine3.15) OpenAPI CLI Version to (1.0.0-beta.88) (thanks to bbrks)

Lock Dependency Version

• Set a fixed Node Alpine Version (15.2.0-alpine-3.0.0) and fixed OpenAPI CLI version (1.0.0-beta.38)

Initial Release

Setup Github Actions

- setup a docker image with redocly openapi cli installed
- setup our github actions entrypoint shell script
- setup the actions metadata file