Skip docs in final image

Author: AlistairB

8.10/ghcup/Dockerfile

@@ -49,7 +49,8 @@ RUN apt-get update && \
     rm -rf /var/lib/apt/lists/*
 
 COPY --from=builder /usr/local/bin /usr/local/bin
-COPY --from=builder /opt/ghc /opt/ghc
+COPY --from=builder /opt/ghc/bin /opt/ghc/bin
+COPY --from=builder /opt/ghc/lib /opt/ghc/lib
 
 # Adjust PATH
 RUN echo 'export PATH="/opt/ghc/bin:$PATH"' >> /etc/profile.d/ghcup_path.sh && \