Connection refused when connecting to keycloak container from backend container
Your Keycloak container using the following port configuration
ports: - "8082:8080"That mean:
Keycloak is reachable from Outside via Port 8082.
But internally (in this docker network), keycloak is only reachable via the exposed 8080 port. So your backend application need to connect (internally) to http://keycloak:8080