[Snyk] Security upgrade nginx from 1.16.1-alpine to stable-alpine

[adamlaska]

This PR was automatically created by Snyk using the credentials of a real user.

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Changes included in this PR

• Dockerfile

We recommend upgrading to nginx:stable-alpine, as this image has only 5 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Some of the most important vulnerabilities in your base image include:

Severity	Priority Score / 1000	Issue	Exploit Maturity
	500	Out-of-bounds Read SNYK-ALPINE310-APKTOOLS-1534688	No Known Exploit
	514	Out-of-bounds Write SNYK-ALPINE310-FREETYPE-1019641	Mature
	400	Use After Free SNYK-ALPINE310-LIBXML2-1300269	No Known Exploit
	571	Off-by-one Error SNYK-ALPINE310-NGINX-1297082	Mature
	400	Improper Certificate Validation SNYK-ALPINE310-OPENSSL-1089244	No Known Exploit

---

Note: You are seeing this because you or someone else with access to this repository has authorized Snyk to open fix PRs.

For more information:
🧐 View latest project report

🛠 Adjust project settings

---

Learn how to fix vulnerabilities with free interactive lessons:

🦉 Learn about vulnerability in an interactive lesson of Snyk Learn.

[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.