message: extended README for graphql-gateway
diff: # Podkrepi.bg graphql-gateway
  The module is the GraphQL gateway used by Podkrepi.bg
  +## Configuration
  +The configuration settings for the GraphQL gateway are set via environmental variables. Each of them is described in the table below.
  +
  +| Setting | Description | Default value |
  +|---------------------|-------------------------------------------------------|---------------|
  +| ACCOUNT_SERVICE_URL | The URL to the gRPC service that is service accounts. | - |
  +| PORT | The port to which the graphql-gateway should bind. | - |
  +
  ## Development
  The module is configured to use [Visual Studio Code](https://code.visualstudio.com/download)'s [Remote Containers extension](https://code.visualstudio.com/docs/remote/containers).
  - Make sure you have the extension installed
  