fix(docker): remove unnecessary volume declaration and clean up bashrc setup

To be sure we have the cache downloaded

Dockerfile

@@ -18,8 +18,7 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     --ingroup users \
     --disabled-password \
     "${USER}" && \
-    apt-get purge -y --auto-remove adduser && \
-    rm -rf /var/lib/apt/lists/*
+    apt-get purge -y --auto-remove adduser
 
 COPY ${TARGETPLATFORM}/CBZOptimizer ${APP_PATH}
 
@@ -33,11 +32,10 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     bash \
     ca-certificates \
     bash-completion && \
-    rm -rf /var/lib/apt/lists/* && \
     /tmp/target/encoder-setup && \
     chmod +x ${APP_PATH} && \
     ${APP_PATH} completion bash > /etc/bash_completion.d/CBZOptimizer.bash
 
-VOLUME ${CONFIG_FOLDER}
+
 USER ${USER}
 ENTRYPOINT ["/usr/local/bin/CBZOptimizer"]