MongoServerSelectionError: getaddringo EAI_AGAIN mongo - node.js

Question

I'm getting an error when my server is connecting to the MongoDB database. Both the server and mongoDB are in containers
The docker-compose files are as follows:
docker-compose.yml
version: '3'
services:
client:
build:
context: ./client
dockerfile: Dockerfile
ports:
- 3001:3001
networks:
- mern-network
volumes:
- ./client/src:/usr/app/src
- ./client/public:/usr/app/public
depends_on:
- server
environment:
- REACT_APP_SERVER=http://localhost:5001
# - CHOKIDAR_USEPOLLING=true
# container 1: backend node server
server:
build:
context: ./server
dockerfile: Dockerfile
ports:
- '5001:5001'
networks:
- mern-network
environment:
- PORT=5001
depends_on:
- mongo
# container 2: database
mongo:
image: mongo:4.4.13
networks:
- mern-network
environment:
- MONGO_INITDB_ROOT_USERNAME=docker_mongo
- MONGO_INITDB_ROOT_PASSWORD=password
volumes:
- mongo-db:/data/db
networks:
mern-network:
driver: bridge
volumes:
mongo-db:
docker-compose.dev.yml
version: '3'
services:
# container 3: client, dev settings
client:
command: npm start
# container 1: server, dev setting
server:
build:
args:
BUILD_ENV: development
volumes:
- ./server/:/app
# - ./server/app/node_modules
environment:
- BUILD_ENV=development
- MONGO_USER=docker_mongo
- MONGO_PASSWORD=password
- SESSION_SECRET=secret123456890qwerty
command: npm run dev
# container 2: database, dev settings
mongo:
environment:
- MONGO_INITDB_ROOT_USERNAME=docker_mongo
- MONGO_INITDB_ROOT_PASSWORD=password
I have no problems accessing into the mongodb database when I inspect the container using docker exec -it but error when I connect with node. I've tried many versions of mongoose still gives me same error.
MongoServerSelectionError: getaddrinfo EAI_AGAIN mongo
at Timeout._onTimeout (/home/user/git_folder/project/server/node_modules/mongodb/lib/sdam/topology.js:312:38)
at listOnTimeout (node:internal/timers:559:17)
at processTimers (node:internal/timers:502:7) {
reason: TopologyDescription {
type: 'Unknown',
servers: Map(1) {
'mongo:27017' => ServerDescription {
_hostAddress: HostAddress { isIPv6: false, host: 'mongo', port: 27017 },
address: 'mongo:27017',
type: 'Unknown',
hosts: [],
passives: [],
arbiters: [],
tags: {},
minWireVersion: 0,
maxWireVersion: 0,
roundTripTime: -1,
lastUpdateTime: 53541928,
lastWriteDate: 0,
error: MongoNetworkError: getaddrinfo EAI_AGAIN mongo
at connectionFailureError (/home/user/git_folder/project/server/node_modules/mongodb/lib/cmap/connect.js:375:20)
at Socket.<anonymous> (/home/user/git_folder/project/server/node_modules/mongodb/lib/cmap/connect.js:295:22)
at Object.onceWrapper (node:events:640:26)
at Socket.emit (node:events:520:28)
at emitErrorNT (node:internal/streams/destroy:157:8)
at emitErrorCloseNT (node:internal/streams/destroy:122:3)
at processTicksAndRejections (node:internal/process/task_queues:83:21)
}
},
stale: false,
compatible: true,
heartbeatFrequencyMS: 10000,
localThresholdMS: 15,
logicalSessionTimeoutMinutes: undefined
},
code: undefined
}