Improved attribution; re-added sub licences since unsure how this repackage/repo needs to comply otherwise

Docker/Dockerfile

@@ -111,6 +111,10 @@ RUN npm --version
 RUN java --version
 
 # # 5. Cleanup
+RUN apt-get autoremove --purge
+RUN apt-get autoclean
+
+RUN rm -rf /var/lib/apt/lists/*
 RUN rm -rf /tmp/*
 RUN rm -rf "${NVM_DIR}/.cache"
 RUN rm /app/requirements.txt