Clean Up and fixing docker build

Dockerfile

@@ -3,6 +3,6 @@ WORKDIR /hafas_db
 COPY Hafas_Main_web.py app.py
 RUN mkdir -p templates
 COPY templates templates/.
-RUN pip3 install Flask
+RUN pip3 install Flask requests
 CMD ["python3", "app.py"]
 EXPOSE 5000