Remove PYTHONPATH setup and add Docker support for tests

Removed the PYTHONPATH configuration in the GitHub Actions workflow file as it is unnecessary. Added a new service in `compose.yml` to mimic the GitHub Actions job for running Python tests, and changed the Python version in the Dockerfile to 3.9-slim for compatibility.

Author: nicholasadamou

.github/workflows/python-pytests.yml

@@ -31,9 +31,6 @@ jobs:
                     pip install poetry
                     poetry install
 
-            - name: Set PYTHONPATH
-              run: echo "PYTHONPATH=$(pwd):$(pwd)/tests" >> $GITHUB_ENV
-
             -   name: Run tests
                 run: |
                     source .venv/bin/activate

Dockerfile

@@ -1,5 +1,5 @@
 # Use an official Python runtime as a parent image
-FROM python:3.12-slim
+FROM python:3.9-slim
 
 # Create a non-root user
 RUN useradd -m user

compose.yml

@@ -22,3 +22,11 @@ services:
         entrypoint: ["/usr/src/app/entrypoint.sh"]
         networks:
             - dcp
+
+    # Mimic the GitHub Actions job for running Python tests
+    python-pytests:
+        build:
+            context: .
+        user: root
+#        entrypoint: ["/bin/bash"] # To get an interactive shell
+        entrypoint: ["poetry", "run", "pytest"]