Updating the docker file with bash as the entrypoint

Author: dipayan90

Dockerfile

@@ -1,2 +1,3 @@
 FROM python:3.8-slim
-RUN apt-get update && apt-get install -y --no-install-recommends r-base r-base-dev
+RUN apt-get update && apt-get install -y --no-install-recommends r-base r-base-dev && rm -rf /var/lib/apt/lists/*
+CMD ["/bin/bash"]

README.md

@@ -5,5 +5,5 @@ A thin docker image having installation of `Python` and `R`. Can be used for dat
 ## Usage Instructions
 
 ```bash
-docker pull docker.pkg.github.com/dipayan90/docker-python-r:latest
+docker run -it docker.pkg.github.com/dipayan90/docker-python-r/base:latest
 ```