Add node to Docker dependencies so readabilipy works as intended

Dockerfile

@@ -7,7 +7,7 @@ ADD . /project
 RUN rm /project/.envrc
 RUN rm -rf /project/env
 
-RUN apt-get update && apt-get install -y python3-dev libldap2-dev libsasl2-dev libssl-dev
+RUN apt-get update && apt-get install -y python3-dev libldap2-dev libsasl2-dev libssl-dev nodejs
 
 RUN pip install -r requirements.txt
 CMD ["flask","run","--host=0.0.0.0"]