devops: implemented user authentication and improved error handling in login module.

pipelines/docker-image-build-then-push-to-local-registry.gitlab-ci.yml

@@ -0,0 +1,27 @@
+image: docker:dind
+
+stages:
+  - build
+  - deploy
+
+  
+default:
+  before_script:
+  - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+
+build-and-push docker image to local registry:
+  stage: build
+  script:
+  - if ! test -z "$DOCKERFILE_DIRECTORY"; then cd ${DOCKERFILE_DIRECTORY}; fi
+  - docker build -f "${DOCKERFILE_NAME}" -t "${CI_REGISTRY_IMAGE}:${DOCKER_IMAGE_TAG}" --progress=plain .
+  - docker push "${CI_REGISTRY_IMAGE}:${DOCKER_IMAGE_TAG}"
+
+push docker to destination registry:
+  stage: deploy
+  script:
+  - if test -z "$DOCKER_REGISTRY"; then exit 0; fi
+  - docker pull "${CI_REGISTRY_IMAGE}:${DOCKER_IMAGE_TAG}"
+  - docker tag "${CI_REGISTRY_IMAGE}:${DOCKER_IMAGE_TAG}" "${DOCKER_REGISTRY}:${DOCKER_IMAGE_TAG}"
+  - docker push "${DOCKER_REGISTRY}:${DOCKER_IMAGE_TAG}"
+  needs:
+    - "build-and-push docker image to local registry"