Add pre commit improve tox setup

{{cookiecutter.project_slug}}/.gitlab-ci.yml

@@ -94,20 +94,12 @@ package_files:
   stage: package
   tags:
     - dind
-  variables:
-    DOCKER_TLS_CERTDIR: "/certs"
   artifacts:
     expire_in: 1w
     paths:
       - dist/*
   script:
-    - unset DOCKER_TLS_VERIFY
-    - env | grep DOCKER
     - source scripts/setup-docker-host.sh
-    - env | grep DOCKER
-    - echo $PATH
-    - which git
-    - which python
     - tox -e build-ci-linux
 
 package_docs: