Delete apt lists from final image (#1174)

Author: SuperSandro2000

Dockerfile

@@ -33,7 +33,8 @@ RUN apt-get update && apt-get install -y \
 	dumb-init \
 	vim \
 	curl \
-	wget
+	wget \
+  && rm -rf /var/lib/apt/lists/*
 
 RUN locale-gen en_US.UTF-8
 # We cannot use update-locale because docker will not use the env variables