1COPY --from=composer /usr/bin/composer /usr/bin/composer 2 3COPY --from=grpc-base /usr/local/bin/protoc /usr/local/bin/protoc 4 5COPY --from=grpc-base /github/grpc/bins/opt/grpc_php_plugin ${'\\'} 6 /usr/local/bin/protoc-gen-grpc 7 8COPY --from=grpc-base ${'\\'} 9 /usr/local/lib/php/extensions/no-debug-non-zts-20170718/grpc.so ${'\\'} 10 /usr/local/lib/php/extensions/no-debug-non-zts-20170718/grpc.so 11