Update Dockerfile (add installing spacy models)

Dockerfile

@@ -11,3 +11,7 @@ RUN $CONDA_DIR/envs/renku/bin/pip install -U -e git+https://github.com/SwissData
 
 RUN sudo apt-get update
 RUN sudo apt-get install -y poppler-utils
+
+# install spacy models
+RUN python -m spacy download de_core_news_sm
+RUN python -m spacy download xx_ent_wiki_sm
\ No newline at end of file