CI/CD pipeline to build on main commit and publish to PyPI on release 9

.gitlab-ci.yml

@@ -5,10 +5,8 @@ default:
       - .pip-cache/
   before_script:
     - python3 --version
-    - sudo apt update
-    - sudo apt install -y python3-pip
-    - pip3 install --upgrade pip
-    - pip3 install build twine
+    - /usr/local/bin/pip3 install --upgrade pip
+    - /usr/local/bin/pip3 install build twine
 
 stages:
   - build