Add bubblewrap (submission sandboxing, untested)

Author: krishnans2006

Dockerfile

@@ -5,7 +5,7 @@ ENV PYTHONUNBUFFERED=1 PIPENV_VENV_IN_PROJECT=1 C_FORCE_ROOT=1
 COPY Pipfile .
 COPY Pipfile.lock .
 
-RUN apt-get update -y && apt-get install -y --no-install-recommends curl firejail
+RUN apt-get update -y && apt-get install -y --no-install-recommends curl firejail bubblewrap
 
 RUN pip install pipenv && \
   pipenv install --dev