dockerized tests to host postgres server

backend/Dockerfile.test

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+FROM python:3.9-slim
+
+# Set the working directory
+WORKDIR /app
+
+# Copy the application code into the container
+COPY . /app
+
+# Install dependencies
+RUN apt-get update 
+RUN apt-get install -y --no-install-recommends python3-pip
+RUN pip3 install --no-cache-dir -r requirements.txt -r dev-requirements.txt
+
+# Set environment variables
+ENV POSTGRES_USER=test_user
+ENV POSTGRES_PASSWORD=test_password
+ENV POSTGRES_DB=test_database
+ENV POSTGRES_HOST=postgres
+
+# Command to run the tests
+CMD ["pytest"]

backend/tests.yaml

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+version: '3.8'
+
+services:
+  postgres:
+    image: postgres:latest
+    environment:
+      POSTGRES_USER: test_user
+      POSTGRES_PASSWORD: test_password
+      POSTGRES_DB: test_database
+
+  test-runner:
+    build:
+      context: .
+      dockerfile: Dockerfile.test
+    depends_on:
+      - postgres
+    environment:
+      POSTGRES_HOST: postgres  # Use the service name defined in Docker Compose
+    volumes:
+      - .:/app
+    command: ["pytest"]