I want to create a build and deploy pipeline for my next js project basically i want to the steps right now i did manual deployment through commands

The steps for this is

1. download updated tar
2. remove previous tar
3. upload new tar
4. untar the tar file
5. remove old image from docker
6. build new image inside code directory
7. stop container
8. remove container
9. build new container

now everytime i did some change i have to run all these commands again again so i what i want is to build a pipeline for my project so when i merge the code pipeline triggers

I try some code in the gitlab-ci.yml file but it does not work. I am expecting to give me the steps for what i need to setup in the gitlab project repo and what i need to do in docker related things please guide as i am first time creating this

here is the code i am trying

stages:
  - build

build-qa:
  stage: build
  when: manual
  variables:
    IMAGE_NAME: registry.gitlab.com:5000/sop3/soneriwebnext
  tags:
    - nextjs
    - soneri
    - web
  script:
    - echo $CI_JOB_TOKEN
    - echo $IMAGE_NAME
    - docker login registry.gitlab.com:5000
    - docker build -t $IMAGE_NAME .
    - docker push $IMAGE_NAME
  only:
    - QA