build maui android image

.gitlab-ci.yml

+stages:
+  - build_images
+
+variables:
+  DOCKER_BUILDX_IMAGE: registry.420joos.dev/docker-buildx:1.1
+  
+  DOCKER_BUILDX_CONTEXT_NAME: dotnet_builder
+  DOCKER_BUILDX_PLATFORM_AMD64: linux/amd64
+  DOCKER_BUILDX_PLATFORM_ARM64: linux/arm64
+  DOCKER_BUILDX_PLATFORMS: $DOCKER_BUILDX_PLATFORM_AMD64,$DOCKER_BUILDX_PLATFORM_ARM64
+  
+
+# Required vars:
+## IMAGE_PATH
+## IMAGE_NAME
+## PLATFORMS
+.build_image_job_template:
+  stage: build_images
+  tags:
+    - docker
+  image: $DOCKER_BUILDX_IMAGE
+  script:
+    - docker login $IMAGE_SERVER --username $DOCKER_USERNAME --password $DOCKER_PASSWORD
+    - docker buildx create --name $DOCKER_BUILDX_CONTEXT_NAME --platform $DOCKER_BUILDX_PLATFORMS --driver docker-container --bootstrap
+    - docker buildx build $IMAGE_PATH --tag $IMAGE_SERVER/$IMAGE_NAME --platform $PLATFORMS --builder $DOCKER_BUILDX_CONTEXT_NAME --push
+    - docker buildx rm $DOCKER_BUILDX_CONTEXT_NAME
+    - docker logout $IMAGE_SERVER
+
+dotnet-maui-android:
+  extends: .build_image_job_template
+  variables:
+    IMAGE_PATH: dotnet-maui-android/
+    IMAGE_NAME: dotnet-maui-android:7.0
+    PLATFORMS: $DOCKER_BUILDX_PLATFORM_AMD64 # multi platform manifest currently not possible because workload maui-android isn't available on arm64 https://developercommunity.visualstudio.com/t/Arm64-support-for-NET-Maui/10107707?q=%5BARM64%5D&stateGroup=active&ftype=idea&sort=relevance
+