Create GitLab CI/CD configuration

.gitlab-ci.yml

+---
+image: docker:19
+stages:
+  - test
+  - deploy
+
+SonarScanner Analysis:
+  image: addianto/sonar-scanner-cli:latest
+  stage: test
+  script:
+    - sonar-scanner
+      -Dsonar.host.url=$SONARQUBE_HOST
+      -Dsonar.login=$SONARQUBE_TOKEN
+  only:
+    - master
+
+Publish to Docker Hub:
+  stage: deploy
+  before_script:
+    - chmod +x build.sh
+  script:
+    - docker login -u $DOCKERHUB_USERNAME -p $DOCKERHUB_PASSWORD
+    - ./build.sh $IMAGE_NAMESPACE
+    - docker push "$IMAGE_NAMESPACE/sonar-scanner-cli:latest"
+  when: manual
+  allow_failure: true
+  tags:
+    - docker
+  only:
+    - master
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sonar-project.properties

+# SonarScanner Properties
+
+## Server
+### sonar.host.url=[pass URL via CLI]
+
+## Project Configuration
+sonar.projectKey=to.adian:sonar-scanner-cli-image
+sonar.exclusions=/.devcontainer/,/.gitlab/
+sonar.scm.provider=git
+
+## Project Identity
+sonar.projectName=SonarQube Scanner CLI Image
+sonar.projectVersion=latest
+
+## Authentication
+### sonar.login=[pass token via CLI]
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