Let's begin the technical development of our RecommendationService microservice by creating a container with the database that will be used. In the case of our microservices, we will use a database based on graphs—the Neo4j. The behavior of this database is very interesting, besides being easy to implement, thus being a perfect example for our application.
In our docker-compose.yml file, we make a small change by adding Neo4j to our stack:
recommendation_db:
image: neo4j:latest
ports:
- "7474:7474"
- "7687:7687"
environment:
NEO4J_AUTH: "none"With this simple particle of code, we already have an instance of Neo4j inside a Docker container.