How to define the special path when I pull code from git registry?

[youngoing]

I want to define frontend folder in my git repo,is there a sub-path I can used?

                args: [
                  `--dockerfile=${config.build.dockerfile}`,
                  `--context=git://${gitContext}#${config.git.branch}`,
                  `--destination=${config.dockerRegistry.registryUrl}:${config.build.tag}`,
                  '--cache=true',
                  '--build-arg=NODE_ENV=production',
                  `--label=build-date=${new Date().toISOString()}`
                ],