gistfile1.js

use admin
db.createUser(
  {
     user: "root",
     pwd: "root",
     roles:["root"]
  }
);

use demo
db.CreateUser(
   {
      user: "demo",
      pwd: "demo12345",
      roles:[
         {
            role:"readwrite",
            db:"demo"
         }
      ]

   }
);

version: '3.3'

services:
   mongo:
      container_name: mongodb
      image: mongo
      ports:
       - "27017:27017"
      volumes:
       - mongodbdata:/data/db
      command: [--auth]
      restart: always
volumes:
   mongodbdata:

networks:
   default:
      external:
         name: mongo-network