reverted dind changed

.gitlab-ci.yml

-image: r.j3ss.co/img:latest
+image: docker:20.10.10
 
 build-image:
   stage: build
   variables:
     IMAGE_NAME: "os-sweb-buildimage"
     IMAGE_TAG: $CI_REGISTRY_IMAGE/$IMAGE_NAME:latest
+  services:
+    - docker:20.10.10-dind
   script:
-    - img login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
-    - img build -t $IMAGE_TAG .
-    - img push $IMAGE_TAG
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+    - docker build -t $IMAGE_TAG .
+    - docker push $IMAGE_TAG
   rules:
     - if: $CI_COMMIT_BRANCH == "main"
       changes: