Add Docker Compose file for running tests locally in a container

.github/workflows/Dockerfile

@@ -7,11 +7,10 @@ ARG GECKODRIVER_LINK=https://github.com/mozilla/geckodriver/releases/download/v$
 ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt update -y && apt install -y python3 python3-pip git gettext curl firefox docker.io rsync
-RUN pip3 install --upgrade pip setuptools wheel
 
 # install python requirements
 COPY requirements.txt requirements.txt
-RUN pip install -r requirements.txt
+RUN pip install --break-system-packages -r requirements.txt
 RUN rm requirements.txt
 
 # install geckodriver for selenium

docker-compose.test.yml

@@ -0,0 +1,14 @@
+version: '3'
+
+# Run tests:
+# docker-compose -f docker-compose.test.yml up gitmanager_unit
+
+services:
+  gitmanager_unit:
+    build:
+      context: .
+      dockerfile: .github/workflows/Dockerfile
+    volumes:
+      - .:/gitmanager
+    working_dir: /gitmanager
+    command: python3 manage.py test