change ci image

.gitlab-ci.yml

@@ -6,26 +6,21 @@
 
 # Official language image. Look for the different tagged releases at:
 # https://hub.docker.com/r/library/python/tags/
-image: python:latest
+image: python:3.11
 
 stages:
   - test
 
 variables:
-  PYTHON_VERSION: "3.8"
+  PYTHON_VERSION: "3.11"  # Explicitly set the Python version variable
 
-# Change pip's cache directory to be inside the project directory since we can
-# only cache local items.
-variables:
-  PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
-
-# https://pip.pypa.io/en/stable/topics/caching/
+# Cache pip packages for faster builds
 cache:
   paths:
     - .cache/pip
 
 before_script:
-  - python --version ; pip --version  # For debugging
+  - python --version ; pip --version  # Verify Python and pip versions
   - pip install virtualenv
   - virtualenv venv
   - source venv/bin/activate
@@ -35,4 +30,4 @@ before_script:
 test:
   stage: test
   script:
-    - pytest
+    - pytest