Update .gitlab-ci.yml file

.gitlab-ci.yml

 # This file is a template, and might need editing before it works on your project.
-# This is a sample GitLab CI/CD configuration file that should run without any modifications.
-# It demonstrates a basic 3 stage CI/CD pipeline. Instead of real tests or scripts,
-# it uses echo commands to simulate the pipeline execution.
-#
-# A pipeline is composed of independent jobs that run scripts, grouped into stages.
-# Stages run in sequential order, but jobs within stages run in parallel.
-#
-# For more information, see: https://docs.gitlab.com/ee/ci/yaml/index.html#stages
-#
-# You can copy and paste this template into a new `.gitlab-ci.yml` file.
-# You should not add this template to an existing `.gitlab-ci.yml` file by using the `include:` keyword.
-#
 # To contribute improvements to CI/CD templates, please follow the Development guide at:
 # https://docs.gitlab.com/ee/development/cicd/templates.html
 # This specific template is located at:
-# https://gitlab.com/gitlab-org/gitlab/-/blob/master/lib/gitlab/ci/templates/Getting-Started.gitlab-ci.yml
+# https://gitlab.com/gitlab-org/gitlab/-/blob/master/lib/gitlab/ci/templates/Docker.gitlab-ci.yml
+
+# Build a Docker image with CI/CD and push to the GitLab registry.
+# Docker-in-Docker documentation: https://docs.gitlab.com/ee/ci/docker/using_docker_build.html
+#
+# This template uses one generic job with conditional builds
+# for the default branch and all other (MR) branches.
 
 stages:
   - build
@@ -22,38 +16,47 @@ stages:
 
 variables:
   DOCKER_HOST: tcp://docker:2375
+  DOCKER_DRIVER: overlay2
   DOCKER_TLS_CERTDIR: ""
-  DOCKER_BUILDKIT: 1
 
 build-docker-image:
   image: docker:latest
   stage: build
   services:
     - docker:dind
+  command: ["--tls=false"]
   before_script:
-    - echo "$DOCKER_PW" | docker login --username "$DOCKER_USER" --password-stdin
+    - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" "$CI_REGISTRY"
   script:
-    - docker build -t "$DOCKER_REPO/$PROJECT:$CI_COMMIT_REF_SLUG" .
-    - docker push "$DOCKER_REPO/$PROJECT:$CI_COMMIT_REF_SLUG"
-  only:
-    - branches
+    - >
+      if [[ "$CI_COMMIT_BRANCH" == "$CI_DEFAULT_BRANCH" ]]; then
+        tag="latest";
+      else
+        tag="$CI_COMMIT_REF_SLUG";
+      fi
+    - docker build --pull -t "$CI_REGISTRY_IMAGE:$tag" .
+    - docker push "$CI_REGISTRY_IMAGE:$tag"
+  rules:
+    - exists:
+        - Dockerfile
 
 deploy-to-bw-cloud:
-  stage: deploy
   image: alpine:latest
+  stage: deploy
   before_script:
-    - apk add --no-cache openssh-client
-    - mkdir -p ~/.ssh
-    - echo "$BW_CLOUD_SSH_PRIVATE_KEY" > ~/.ssh/id_rsa
-    - chmod 600 ~/.ssh/id_rsa
-    - ssh-keyscan -H "$BW_CLOUD_IP" >> ~/.ssh/known_hosts
+    - apk add --no-cache sshpass
   script:
     - >
-      ssh "$BW_CLOUD_USER@$BW_CLOUD_IP" "
-      docker pull $DOCKER_REPO/$PROJECT:$CI_COMMIT_REF_SLUG &&
-      docker stop flask-container || true &&
-      docker rm flask-container || true &&
-      docker run -d --name flask-container -p 5001:5000 $DOCKER_REPO/$PROJECT:$CI_COMMIT_REF_SLUG
+      if [[ "$CI_COMMIT_BRANCH" == "$CI_DEFAULT_BRANCH" ]]; then
+        tag="latest";
+      else
+        tag="$CI_COMMIT_REF_SLUG";
+      fi
+    - sshpass -p "$BW_CLOUD_PASSWORD" ssh -o StrictHostKeyChecking=no "$BW_CLOUD_USER@$BW_CLOUD_HOST" "
+        docker pull $CI_REGISTRY_IMAGE:$tag &&
+        docker stop flask-container || true &&
+        docker rm flask-container || true &&
+        docker run -d --name flask-container -p 5001:5000 $CI_REGISTRY_IMAGE:$tag
       "
   only:
     - main
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