build: add docker-compose deployment

Dockerfile

@@ -0,0 +1,15 @@
+FROM python:3.8-slim
+
+RUN groupadd -r mapper && useradd --no-log-init -r -g mapper mapper
+
+WORKDIR /app
+
+COPY requirements.txt ./
+
+RUN pip install --no-cache-dir --upgrade pip \
+    && pip install --no-cache-dir -r /app/requirements.txt gunicorn
+
+COPY . ./
+
+ENTRYPOINT [ "/app/entrypoint.sh" ]
+CMD [ "gunicorn", "-w", "2", "-b", "0.0.0.0:8000", "breccia_mapper.wsgi" ]