复现walinejs / waline的[Bug]: MongoDB，当不使用Replica Set时，连接立即失败，并且服务器循环连接造成极高CPU占用

docker-compose.yml

version: '3'

services:
  waline:
    container_name: waline
    image: lizheming/waline:latest
    restart: always
    ports:
      - 127.0.0.1:8360:8360
    volumes:
      - /root/waline/data:/app/data
    environment:
      MONGO_HOST: 'example.com'
      MONGO_DB: 'blog-waline'
      MONGO_USER: 'some-user'
      MONGO_PASSWORD: 'some-password'
      MONGO_AUTHSOURCE: 'blog-waline'
      MONGO_OPT_SSL: 'true'