[StepSecurity] Apply security best practices

[step-security-bot]

Summary

This pull request is created by Secure Repo at the request of @MartinWitt. Please merge the Pull Request to incorporate the requested changes. Please tag @MartinWitt on your message if you have any questions related to the PR. You can also engage with the StepSecurity team by tagging @step-security-bot.

Security Fixes

Pinned Dependencies

GitHub Action tags and Docker tags are mutatble. This poses a security risk. GitHub's Security Hardening guide recommends pinning actions to full length commit.

• GitHub Security Guide
• The Open Source Security Foundation (OpenSSF) Security Guide

Secure Dockerfiles

Pin image tags to digests in Dockerfiles. With the Docker v2 API release, it became possible to use digests in place of tags when pulling images or to use them in FROM lines in Dockerfiles.

• The Open Source Security Foundation (OpenSSF) Security Guide

Add OpenSSF Scorecard Workflow

OpenSSF Scorecard is an automated tool that assesses a number of important heuristics ("checks") associated with software security and assigns each check a score of 0-10. You can use these scores to understand specific areas to improve in order to strengthen the security posture of your project.

Scorecard workflow also allows maintainers to display a Scorecard badge on their repository to show off their hard work.

• The Open Source Security Foundation (OpenSSF) Scorecard

Feedback

For bug reports, feature requests, and general feedback; please create an issue in step-security/secure-repo. To create such PRs, please visit https://app.stepsecurity.io/securerepo.

Signed-off-by: StepSecurity Bot bot@stepsecurity.io

[MartinWitt]

Related issue #5216

[I-Al-Istannen]

Doesn't look actively harmful, I think