Intermediate — two services with Compose

Band: Intermediate
Setup: examples/docker-compose.yml.

Task: Add a second service (a redis:7-alpine with no ports published is enough) or convert your exercise-1 app into a two-service Compose file. Bring the stack up and down with Compose.

Hint: Services on the default Compose network can reach each other by service name. docker compose ps should list both.

Success: docker compose up -d starts two containers; curl to the web port still works; docker compose down removes them.