[StepSecurity] Apply security best practices

[step-security-bot]

Summary

This pull request is created by Secure Repo at the request of @nlamirault. Please merge the Pull Request to incorporate the requested changes. Please tag @nlamirault 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

Least Privileged GitHub Actions Token Permissions

The GITHUB_TOKEN is an automatically generated secret to make authenticated calls to the GitHub API. GitHub recommends setting minimum token permissions for the GITHUB_TOKEN.

• 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 [email protected]