Create SECURITY.md

[JPAKantawitz]

Pull Request Template

Please, go through these steps before you submit a PR.

1. Make sure that your PR is not a duplicate.

2. Before submitting the PR, review your changes:

   • Adjust the code to the existing style.
   • Add a set of unit tests for the changes and ensure they all pass.
   • Add accompanying README.md file with instructions on usage. See awesome-readme for good examples of high-quality READMEs.
   • Add a link to your contribution in the top-level README (alpha-order).
   • Add Apache 2.0 license headers with an up-to-date copyright date attributed to Google LLC.
   • Remove unnecessary LICENSE files. There's no need to include an additional license since all repository submissions are covered by the top-level Apache 2.0 license.

3. After these steps, you're ready to open a pull request.

   • Give a descriptive title to your PR.
   • Provide a description of your changes.
   • Put closes #XXXX in your comment to auto-close the issue that your PR fixes (if such).

PLEASE REMOVE THIS TEMPLATE BEFORE SUBMITTING

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[agold-rh]

@JPAKantawitz If you can take care of the CLA, I'll gladly review this PR.