Edit .gitlab-ci.yml

image: docker:27

services:

  - docker:27-dind

variables:

  DOCKER_HOST: tcp://docker:2375

  DOCKER_TLS_CERTDIR: ""

stages:

  - build

  - push

variables:

  IMAGE_NAME: $CI_REGISTRY/$CI_PROJECT_PATH

  IMAGE_TAG: latest

before_script:

  - docker info

build:

  stage: build

  script:

    - docker build -t $IMAGE_NAME:$IMAGE_TAG .

    - docker build -t $CI_REGISTRY_IMAGE:latest .

  only:

    - main

  stage: push

  script:

    - echo "$CI_REGISTRY_PASSWORD" | docker login -u "$CI_REGISTRY_USER" $CI_REGISTRY --password-stdin

    - docker tag $IMAGE_NAME:$IMAGE_TAG $CI_REGISTRY_IMAGE:$IMAGE_TAG

    - docker push $CI_REGISTRY_IMAGE:$IMAGE_TAG

    - docker push $CI_REGISTRY_IMAGE:latest

  only:

    - main