bin(run-in-docker, run-tests-in-docker): should pass `--read-only` to docker run

[ee7]

zig-test-runner/bin/run-in-docker.sh

Lines 38 to 47 in b8b9d02

	# TODO: enable --read-only flag
	# Run the Docker image using the settings mimicking the production environment
	docker run \
	--rm \
	--network none \
	--mount type=bind,src="${solution_dir}",dst=/solution \
	--mount type=bind,src="${output_dir}",dst=/output \
	--mount type=tmpfs,dst=/tmp \
	exercism/zig-test-runner "${slug}" /solution /output

zig-test-runner/bin/run-tests-in-docker.sh

Lines 21 to 32 in b8b9d02

	# TODO: enable --read-only flag
	# Run the Docker image using the settings mimicking the production environment
	docker run \
	--rm \
	--network none \
	--mount type=bind,src="${PWD}/tests",dst=/opt/test-runner/tests \
	--mount type=tmpfs,dst=/tmp \
	--volume "${PWD}/bin/run-tests.sh:/opt/test-runner/bin/run-tests.sh" \
	--workdir /opt/test-runner \
	--entrypoint /opt/test-runner/bin/run-tests.sh \
	exercism/zig-test-runner