Initial skeleton and main function

.gitlab-ci.yml

cmd/infohub/main.go

design/design.go

gen/http/cli/infohub/cli.go

gen/http/openapi.json

gen/http/openapi.yaml

gen/http/openapi3.json

gen/http/openapi3.yaml

gen/infohub/service.go

internal/config/config.go

internal/service/error_response.go

internal/service/health/service.go

internal/service/infohub/service.go