add debug log

Change-Id: I6232c78ee7025ace9a686342e768656f2a9e783a

Author: chickenlj

core/src/main/java/io/agentscope/runtime/sandbox/manager/SandboxManager.java

@@ -141,6 +141,8 @@ public void start() {
             logger.info("Using in-memory container storage");
         }
 
+        logger.info("Using container type: " + this.containerManagerType);
+
         switch (this.containerManagerType) {
             case DOCKER:
                 DockerClientConfig dockerClientConfig;
@@ -155,6 +157,8 @@ public void start() {
                 dockerClientConfig.setRedisConfig(managerConfig.getRedisConfig());
 
                 DockerClient dockerClient = new DockerClient(dockerClientConfig);
+                logger.info("Docker client created: " + dockerClient);
+
                 this.containerClient = dockerClient;
                 this.client = dockerClient.connectDocker();
                 break;