version: '3'
services:
 # mysql:
  # image: mysql
   #container_name: mysql8
   #restart: always
   #ports:
    #- "3306:3306"
   #environment:
   # - MYSQL_ROOT_PASSWORD=root
    #  MYSQL_DATABASE=SkyWalking
   mongo:
    image: mongo
    container_name: mongo  
    ports:
      - "27017:27017"
    environment:
         MONGO_INITDB_DATABASE: yapi   
    #     MONGO_INITDB_ROOT_USERNAME: yapi
     #    MONGO_INITDB_ROOT_PASSWORD: yapi@123
    restart: always
    volumes:
        - ./mongo/data:/data/db:rw
        - ./mongo/log:/data/log
        - ./mongo/conf:/data/conf        
        - ./mongo/json:/data/json
    command: mongod --dbpath /data/db    
   yapi:
     depends_on: 
        - mongo
     image: jayfong/yapi:latest
     container_name: yapi
     ports:
      - "3000:3000"
     volumes:
       - ./config/config.json:/yapi/config.json
     environment:
       YAPI_DB_SERVERNAME: mongo
       YAPI_DB_PORT: 27017
       YAPI_DB_DATABASE: yapi

config.json

{
	"port": 3000,
	"adminAccount": "admin@qq.com",
	"db": {
		"servername": "mongo",
		"DATABASE": "yapi",
		"port": 27017
	},
	"mail": {
		"enable": false,
		"host": "smtp.163.com",
		"port": 465,
		"from": "***@163.com",
		"auth": {
			"user": "***@163.com",
			"pass": "*****"
		}
	},
	"ldapLogin": {},
	"plugins": []
}