Prevent pip cache in Dockerfile to make Docker image smaller

Author: PeterDaveHello

Dockerfile

@@ -4,7 +4,7 @@ RUN apk upgrade --no-cache
 RUN apk add --no-cache rust cargo openssl-dev libffi-dev py3-pip python3 samba-client samba-common-tools yaml-dev
 RUN apk add --no-cache --virtual build-dependencies build-base git \
   && git clone https://github.com/cddmp/enum4linux-ng.git \
-  && pip install -r enum4linux-ng/requirements.txt \
+  && pip install --no-cache-dir -r enum4linux-ng/requirements.txt \
   && apk del build-dependencies
 WORKDIR enum4linux-ng
 ENTRYPOINT ["python", "enum4linux-ng.py"]