feature : --no-cache-dir to save space

save on docker image size

Author: kangwonlee

Dockerfile

@@ -18,6 +18,6 @@ COPY ai_tutor.py /ai_tutor.py
 COPY locale/ /locale/
 
 RUN python3 -m pip install --upgrade pip
-RUN python3 -m pip install -r /requirements.txt
+RUN python3 -m pip install --no-cache-dir --requirement /requirements.txt
 
 ENTRYPOINT ["/entrypoint.py"]