Docker Compose: Restore wait-for-dependencies recipe for Metabase CI

Otherwise, the downstream application will connect to CrateDB or
other services before they are ready to serve requests, resulting
in connection errors.

Author: amotl

application/metabase/docker-compose.yml

@@ -38,3 +38,14 @@ services:
       test: curl --max-time 25 http://localhost:4200 || exit 1
       interval: 30s
       timeout: 30s
+
+  # Wait for all defined services to be fully available by probing their health
+  # status, even when using `docker compose up --detach`.
+  # https://marcopeg.com/2019/docker-compose-healthcheck/
+  wait:
+    image: dadarek/wait-for-dependencies
+    depends_on:
+      metabase:
+        condition: service_healthy
+      cratedb:
+        condition: service_healthy