facing connection refused error while trying to run test cases from one container which is hitting the zalenium container

Question

When running my selenium testcases on Zalenium grid locally and it runs fine. I have created image of my project using the docker file below. i have written the docker compose file to start the zalenium grid . But when trying to run image of my project to create container and run test cases inside my container it is giving connection refused error.

Dockerfile of my project to create image is below

FROM openjdk:11.0.1-debian
VOLUME /tmp
ADD web_runnable.jar app.jar
ADD cacerts cacerts
ADD config.properties config
EXPOSE 8000
ENV USERNAME xyz
ENV PASSWORD xyz
ENV GRID true
ENTRYPOINT sh -c 'java -jar -Dconfig=config -DuserName=$USERNAME -Dpassword=$PASSWORD  -Dgrid=$GRID -Djavax.net.ssl.trustStorePassword=changeit -Djavax.net.ssl.trustStore=cacerts /app.jar com.tsys.driverscript.DriverScript.class' 

Docker compose file to start zalenium is below

version: '3.5'
services:
  zalenium:
    image: dosel/zalenium
    container_name: zalenium_container
    networks:
      - main    
    restart:  always
    ports:
     - "4444:4444"
    command: ["start", "--desiredContainers", "1", "--maxDockerSeleniumContainers", "1","--sauceLabsEnabled","false","--screenWidth", "1280", "--screenHeight", "720" , --timeZone , "Asia/Kolkata", "--seleniumImageName","elgalu/selenium:latest"]
    volumes:
     - /var/run/docker.sock:/var/run/docker.sock
     - /Users/nikitatorane/videos:/home/seluser/videos   
    privileged: true

  selenium:
    image: elgalu/selenium:latest
    container_name: selenium_container
    networks:
      - main
    restart:  always
networks:
  main: 
    name: main

I have setup my huburl as below :

NODE = "http://zalenium:4444/wd/hub";

When I'm trying to run image using with setting the same network on which zalenium is running then also i am getting connection refused error being all containers in same network.

Command to build image of my project is below : docker build -t xyz:1.2

command to run my project image is below : docker run -it --net=main xyz:1.2

error while running image is below :*

Caused by: java.net.ConnectException: Connection refused (Connection refused)
        at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)
        at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)
        at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)
        at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403)
        at java.base/java.net.Socket.connect(Socket.java:591)
        at org.apache.http.conn.socket.PlainConnectionSocketFactory.connectSocket(PlainConnectionSocketFactory.java:74)
        at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:141)
        ... 52 more

I even tried to link two containers and then also getting same error as above. Can anyone go through this and let me know where I am going wrong ?