ERROR: Service 'webapp' failed to build : When using COPY with more than one source file, the destination must be a directory and end with a / code example

Example: ERROR: Service 'webapp' failed to build : When using COPY with more than one source file, the destination must be a directory and end with a /

ONBUILD COPY --chown=app:app Gemfile Gemfile.lock /usr/share/app/