Merge branch 'MA/CI_CD_v2' into 'main'

Add ci/cd pipeline.

See merge request ma03081/COM3014!40

.gitlab-ci.yml

+##################
+# CI/CD Pipeline #
+##################
+stages:
+  - build
+  - test
+  - deploy
+
+.default_tags: &default_tags
+  tags:
+    - all-jobs
+
+###############
+# Build Stage #
+###############
+build_user_service:
+  <<: *default_tags
+  stage: build
+  script:
+    - echo "Building User Microservice"
+    - dotnet publish UserMicroservice -c Release -o ./output/UserMicroservice
+  artifacts:
+    paths:
+      - output/UserMicroservice/
+
+build_flight_service:
+  <<: *default_tags
+  stage: build
+  script:
+    - echo "Building Flight Microservice"
+    - dotnet publish FlightMicroservice -c Release -o ./output/FlightMicroservice
+  artifacts:
+    paths:
+      - output/FlightMicroservice/
+
+build_booking_service:
+  <<: *default_tags
+  stage: build
+  script:
+    - echo "Building Booking Microservice"
+    - dotnet publish BookingMicroservice -c Release -o ./output/BookingMicroservice
+  artifacts:
+    paths:
+      - output/BookingMicroservice/
+
+build_gateway_api:
+  <<: *default_tags
+  stage: build
+  script:
+    - echo "Building Gateway API"
+    - dotnet publish GatewayAPI -c Release -o ./output/GatewayAPI
+  artifacts:
+    paths:
+      - output/GatewayAPI/
+
+build_client_app:
+  <<: *default_tags
+  stage: build
+  script:
+    - echo "Building Client Application"
+    - cd client
+    - npm install
+    - npm run build
+    - mkdir -p ../output/client
+    - cp -R build/* ../output/client/
+  artifacts:
+    paths:
+      - output/client/
+
+##############
+# Test Stage #
+##############
+test-services:
+  <<: *default_tags
+  stage: test
+  script:
+    - echo "Running unit tests..."
+    - find . -name "*.Tests.csproj" -exec dotnet test {} \;
+  artifacts:
+    when: always
+    reports:
+      junit: 
+        - "**/TestResults/*.xml"
+  coverage: '/^Total coverage: (\d+\.\d+)%/'
+
+################
+# Deploy Stage #
+################
+deploy_services_to_registry:
+  <<: *default_tags
+  stage: deploy
+  script:
+    - echo "Publishing User Microservice to GitLab Package Registry..."
+    - dotnet nuget push "output/UserMicroservice/*.nupkg" --source "https://gitlab.example.com/api/v4/projects/$CI_PROJECT_ID/packages/nuget" --api-key $CI_JOB_TOKEN
+    - echo "Publishing Flight Microservice to GitLab Package Registry..."
+    - dotnet nuget push "output/FlightMicroservice/*.nupkg" --source "https://gitlab.example.com/api/v4/projects/$CI_PROJECT_ID/packages/nuget" --api-key $CI_JOB_TOKEN
+    - echo "Publishing Booking Microservice to GitLab Package Registry..."
+    - dotnet nuget push "output/BookingMicroservice/*.nupkg" --source "https://gitlab.example.com/api/v4/projects/$CI_PROJECT_ID/packages/nuget" --api-key $CI_JOB_TOKEN
+    - echo "Publishing Gateway API to GitLab Package Registry..."
+    - dotnet nuget push "output/GatewayAPI/*.nupkg" --source "https://gitlab.example.com/api/v4/projects/$CI_PROJECT_ID/packages/nuget" --api-key $CI_JOB_TOKEN
+    - echo "Publishing Client Application to GitLab NPM Registry..."
+    - cd output/client
+    - npm pack
+    - npm publish --registry "https://gitlab.example.com/api/v4/projects/$CI_PROJECT_ID/packages/npm" --auth "//gitlab.example.com/api/v4/projects/$CI_PROJECT_ID/packages/npm/:_authToken=$CI_JOB_TOKEN"
+  dependencies:
+    - build_user_service
+    - build_client_app
+    - build_gateway_api
+    - build_booking_service
+    - build_flight_service
+  only:
+    - /^release\/.*$/
+
+deploy_docker_images:
+  <<: *default_tags
+  stage: deploy
+  script:
+    - echo "Building and pushing Docker images..."
+    - docker-compose -f docker-compose.yml build
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+    - docker-compose -f docker-compose.yml push
+  only:
+    - /^release\/.*$/