FEAT(multi-arch): add support for multi arch

gitlab-ci builds now for armv7, arm64v8 and amd64

.gitlab-ci.yml

+image: docker:stable
 variables:
   DOCKER_HOST: tcp://docker:2375/
+  DOCKER_TLS_CERTDIR: ""
 
 stages:
   - test
@@ -33,6 +35,7 @@ run_test_cases:
       junit: report.xml
 
 check_coverage:
+  image: python:3.9
   stage: test
   needs: ["run_test_cases"]
   before_script:
@@ -48,6 +51,7 @@ check_coverage:
         path: coverage.xml
 
 check_style:
+  image: python:3.9
   stage: test
   needs: ["run_test_cases"]
   before_script:
@@ -59,29 +63,28 @@ check_style:
 
 docker-push:
   # Use the docker image with buildx support for multi arch.
-  image: jonoh/docker-buildx-qemu
+  image: jdrouet/docker-with-buildx:20.10.21-0.9.1
   stage: release
   variables:
     # the name of the image without version
     AURA_IMAGE_NAME: "autoradio/engine-recorder"
   services:
-    - docker:dind
+    - docker:20.10.21-dind
+
   before_script:
     # default repo is docker.io (aka docker hub)
     - docker login -u "$DOCKER_ID" -p "$DOCKER_HUB_AUTH"
-    - docker buildx create --driver docker-container --use
-    - docker buildx inspect --bootstrap
+    - docker buildx create --use
   script:
-    # Important: Ensures execution of other binary formats is enabled in the kernel
-    - update-binfmts --enable
     # every commit on main branch should build image as unstable
     # else it is from a tag (enforced by gitlab-ci rules)
     # hint: tags are references independent of branches
     - |
       if [ "$CI_COMMIT_BRANCH" == "$CI_DEFAULT_BRANCH" ]
-        then docker buildx build --platform linux/arm/v6,linux/arm64/v8,linux/amd64 -t $AURA_IMAGE_NAME:unstable --push.
-        else docker buildx build --platform linux/arm/v6,linux/arm64/v8,linux/amd64 -t $AURA_IMAGE_NAME -t $AURA_IMAGE_NAME:$CI_COMMIT_TAG --push.
+        then docker buildx build --platform linux/arm/v7,linux/arm64/v8,linux/amd64 -t $AURA_IMAGE_NAME:unstable .
+        else docker buildx build --platform linux/arm/v7,linux/arm64/v8,linux/amd64 -t $AURA_IMAGE_NAME -t $AURA_IMAGE_NAME:$CI_COMMIT_TAG .
       fi
+    - docker push "$AURA_IMAGE_NAME" --all-tags
   rules:
     # - *release-rules
     - if: $CI_COMMIT_TAG =~ /^\d+[.]\d+[.]\d+$/ || $CI_COMMIT_TAG =~ /^\d+[.]\d+[.]\d+[-]\S+$/