Add numpy into docker image

Former-commit-id: 49e1dde4
Former-commit-id: cd7e8b7e

Docker/Dockerfile

@@ -4,7 +4,7 @@ COPY prefactor/scripts/* /opt/lofar/scripts/
 COPY prefactor/skymodels/* /data/skymodels/
 COPY prefactor/rfistrategies/* /data/rfistrategies/
 COPY prefactor/solutions/ /data/solutions/*
-RUN apt update && apt install vim
+RUN apt update && apt install -y vim python3-numpy
 RUN ln -sf /opt/lofar/scripts/* /usr/local/bin/
 
 RUN chmod +rx /usr/local/bin/*