Update dockerfile

Author: Andres Vargas

Dockerfile

@@ -6,4 +6,4 @@ COPY requirements.txt /code/
 RUN pip install -r requirements.txt
 COPY . /code/
 EXPOSE 8000
-CMD ["python","manage.py","gunicorn"]
+CMD ["python","manage.py","gunicorn", "-b","0:8000"]