Casdoor: Change to curl for healthcheck

ansible/casdoor/docker-compose.yml.j2

@@ -27,7 +27,10 @@ services:
         tag: "casdoor"
     restart: unless-stopped
     healthcheck:
-      test: ["CMD", "wget", "-q", "--spider", "http://localhost:{{ casdoor_port }}/api/health"]
+      # curl is installed in the casbin/casdoor image (see upstream Dockerfile);
+      # wget is not guaranteed to be present, and BusyBox wget --spider behaves
+      # inconsistently. Use `curl -f` per ouranos.md standards.
+      test: ["CMD", "curl", "-f", "http://localhost:{{ casdoor_port }}/api/health"]
       interval: 30s
       timeout: 10s
       retries: 3