change image name

docker-compose.yml

@@ -2,6 +2,7 @@ version: '3'
 services: 
   app:
     build: .
+    image: slack-dingtalk-bridge
     ports: 
       - 3000:3000
     restart: unless-stopped
@@ -9,4 +10,3 @@ services:
       - SLACK_SIGNING_SECRET=***
       - SLACK_BOT_TOKEN=xoxb-***
       - DINGTALK_WEBHOOK='https://oapi.dingtalk.com/robot/send?access_token=这里填写自己钉钉群自定义机器人的token'
-