Fixed a mistake in Dockerfile
Fixed a mistake in Dockerfile

hasura/quickstart-docker-git,hasura/quickstart-docker-git,hasura/quickstart-docker-git,hasura/quickstart-docker-git,hasura/quickstart-docker-git,hasura/quickstart-docker-git,hasura/quickstart-docker-git,hasura/quickstart-docker-git,hasura/quickstart-docker-git,hasura/quickstart-docker-git,hasura/quickstart-docker-git