Update Dockerfile.test

trying againnn

backend/tests/Dockerfile.test

@@ -1,16 +1,14 @@
-# We Use an official Python runtime as a parent image
-FROM python:3.12-slim
+# Use a base Python image
+FROM python:3.9-slim
 
-# Allows docker to cache installed dependencies between builds
-COPY requirements.txt requirements.txt
-RUN pip install --no-cache-dir -r requirements.txt
+# Set the working directory in the container
+WORKDIR /app
 
-# Mounts the application code to the image
-RUN mkdir /app
+# Copy the application code into the container
 COPY . /app
-WORKDIR /app
 
-EXPOSE 8000
+# Install dependencies (including coverage)
+RUN pip install --no-cache-dir -r requirements.txt coverage
 
-# Runs migrations and starts the server
-CMD ["sh", "-c", "python manage.py migrate && python manage.py runserver 0.0.0.0:8000"]
+# Run Django tests with coverage
+CMD coverage run manage.py test