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

gitlab-ci builds now for armv7, arm64v8 and amd64

.gitlab-ci.yml

-image: python:3.9
 variables:
   DOCKER_HOST: tcp://docker:2375/
 
@@ -21,6 +20,7 @@ stages:
       - Dockerfile
 
 run_test_cases:
+  image: python:3.9
   stage: test
   before_script:
     - *install_requirements