Add just the testing setup from #26.

Important: there are changes here to adapt the tests and the Keycloak test realm that are incompatible with the changes in #29. Ultimately, the changes in #29 need to be applied over this.

testing/compose.yaml

@@ -12,6 +12,17 @@ services:
     ports:
       - "8080:8080"
       - "8081:8081"
+    networks:
+      - keycloak
     volumes:
       - ./import:/opt/keycloak/data/import/
-      - ../attribute-endpoints-provider/target/attribute-endpoints-provider-1.0-SNAPSHOT.jar:/opt/keycloak/providers/attribute-endpoints-provider.jar
+      - ../attribute-endpoints-provider/target/attribute-endpoints-provider-1.0-SNAPSHOT.jar:/opt/keycloak/providers/attribute-endpoints-provider.jar
+
+networks:
+  # force a "local" IP address that Keycloak accepts HTTP (not HTTPS) requests from
+  keycloak:
+    driver: bridge
+    ipam:
+      config:
+        - subnet: 192.168.231.128/29
+          gateway: 192.168.231.129