fix: Remove pip cache in Dockerfile

Author: Bilel Omrani

Dockerfile

@@ -5,6 +5,6 @@ WORKDIR /app
 # Add dependencies
 RUN apk add --update -t --no-cache git curl alpine-sdk
 
-RUN ["pip", "install", "commitizen>=2,<3"]
+RUN ["pip", "install", "--no-cache-dir", "commitizen>=2,<3"]
 
 CMD [ "cz", "version" ]