This microservice is responsible for getting metadata from external providers (MusicBrainz, Genius, etc.)

It receives events through a message queue, and pushes the metadata to the API (using the HTTP API).

• RABBITMQ_URL: URL to the RabbitMQ service
• API_URL: URL to the API/server service
• API_KEYS: List of comma separated keys used by microservices (e.g. scanner, matcher) to authenticate

For tests, we need additional variables:

• GENIUS_ACCESS_TOKEN: Token to authenticate to the Genius Provider
• DISCOGS_ACCESS_TOKEN: Token to authenticate to the Discogs Provider

• settings.json: JSON File located in INTERNAL_CONFIG_DIR. See user doc for specs.