Disable cache directory

Dockerfile

@@ -2,7 +2,7 @@ FROM python:3.7
 
 WORKDIR /app/service
 COPY ./requirements.txt ./requirements.txt
-RUN pip install -r requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt
 COPY ./karton ./karton
 COPY ./setup.py ./setup.py
 RUN pip install .