message: Add missing readme information
diff: -# API service
  +# amazee.io API
  +
  +The amazee.io API for the amazee.io infrastructure.
  +
  +## URLs
  +
  +### develop branch:
  +
  +- http://api-develop.appuio.amazeeio.review/ - uses the production hiera (https://git.vshn.net/amazee/amazee_hieradata branch master)
  +- http://api-develop-testhiera.appuio.amazeeio.review/ - uses the testhiera (https://github.com/amazeeio/api-test-hiera branch master)
  +
  +### master branch
  +
  +- https://api.amazeeio.cloud
  +
  +## Local development with Docker
  +
  +As the API is hosted within Docker, Docker can also be used for development.
  +This means there is no need to have Node.js, Yarn or any development dependency locally
  +installed. All you need is Docker and Docker Compose (included in Docker for Mac).
  +
  +### Installation
  +
  +```sh
  +# Install Docker for Mac
  +brew cask install docker
  +
  +# Then open Docker for Mac to finish the installation
  +```
  +
  +For our unit-tests, we require the test-api-hiera git submodule to be initialized.
  +
  +```
  +# Install submodules
  +git submodule update --init --recursive
  +```
  +
  +### Usage
  +
  +Run
  +
  +```sh
  +docker-compose up
  +```
  +
  +and this will build the Docker image (takes a bit) and start the API and
  +authentication services in development mode (e.g. `yarn run dev` in case
  +of the API).
  +
  +Run a service in production mode (e.g. the API server):
  +
  +```sh
  +docker-compose run --rm --service-ports api yarn run start
  +```
  +
  +Unfortunately this does not give a lot of flexibility. So you might just open
  +a bash to the Docker Container and run yarn commands directly:
  +
  +```sh
  +docker-compose run --rm --service-ports api bash
  +```
  +
  +Now you are inside the Docker container and can run any commands like:
  +
  +```sh
  +yarn run build
  +yarn run start
  +```
  +
  +Similar results can be achieved with the other services.
  ## Local Development without Docker (node and yarn installed on your machine)
  