Added forward slash to COPY command.
This fixes an error on my system caused by not specifying to copy into the directory. The original error reads:
"When using COPY with more than one source file, the destination must be a directory and end with a /".
This change allows for this image to build successfully on my system using docker version 19.03.11-ce
. @dkazakov Let me know if this change continues to work on your system environment. :)