[Snyk] Security upgrade nginx from stable to 1.22

[zmaleki]

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:1.22, as this image has only 88 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
	436	CVE-2022-1664 SNYK-DEBIAN11-DPKG-2847942	No Known Exploit
	500	OS Command Injection SNYK-DEBIAN11-OPENSSL-2807596	No Known Exploit
	500	Out-of-bounds Read SNYK-DEBIAN11-PCRE2-2808697	No Known Exploit
	500	Out-of-bounds Read SNYK-DEBIAN11-PCRE2-2808704	No Known Exploit
	221	Out-of-bounds Read SNYK-DEBIAN11-TIFF-2823291	No Known Exploit

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