Update Dockerfile

added npm

Dockerfile

 ENV PYTHONUNBUFFERED 1
 
 RUN curl -sL https://deb.nodesource.com/setup_14.x | bash -
-RUN apt-get install -y nodejs
+RUN apt-get install -y nodejs npm
 
 COPY ./requirements.txt /requirements.txt
 RUN pip3 install -r /requirements.txt