Update Dockerfile

Dockerfile

@@ -37,9 +37,9 @@ RUN rm -f /etc/apt/sources.list.d/*.list && \
     gpg \
     gpg-agent \
     ffmpeg \
-    && rm -rf /var/lib/apt/lists/*
+    && rm -rf /var/lib/apt/lists \
     software-properties-common \
- && rm -rf /var/lib/apt/lists/*
+ && rm -rf /var/lib/apt/lists
 
 # Fix ImageMagick policy
 RUN sed -i '/<policy domain="path" rights="none" pattern="@\*"/d' /etc/ImageMagick-6/policy.xml