HOLI-1433 proxy to okuna

See merge request holisticfoundation/holi-unified-api!6

HOLI-1430 deploy oathkeeper

See merge request holisticfoundation/holi-unified-api!5

NOISSUE: add graphql-playground

See merge request holisticfoundation/holi-unified-api!4

Simple solution to get an interactive tool to explore our GraphQL API. Please note:
graphql-playground is retiring (see
https://www.apollographql.com/docs/apollo-server/api/plugin/landing-pages/#graphql-playground-landing-page)
and will eventually be replaced with GraphiQL.

HOLI-1502: use newest version of apollo-server-express

See merge request holisticfoundation/holi-unified-api!3

HOLI-1486 ci on google

See merge request holisticfoundation/holi-unified-api!2

HOLI-1487 HOLI-1488 HOLI-1489 separate repo, docker, CI

See merge request holisticfoundation/holi-unified-api!1