Add build for arm64v8

.gitlab-ci.yml

@@ -50,7 +50,8 @@ release-docker:
     - web
   script:
     - docker login "$CI_REGISTRY" -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD"
-    - docker build -t send .
+    - docker buildx create --name sendBuilder
+    - docker buildx use sendBuilder
     - |
       if [ "$CI_PIPELINE_SOURCE" == "merge_request_event" ]; then
         IMAGE_NAMES="$CI_REGISTRY_IMAGE/mr:$CI_MERGE_REQUEST_IID"
@@ -61,8 +62,7 @@ release-docker:
       fi
     - |
       for image in $IMAGE_NAMES; do
-        docker tag send $image
-        docker push $image
+        docker buildx build --platform linux/amd64,linux/arm64 -t $image . --push
       done
     - |
       echo "Container image pushed. You can pull it with";