[Snyk] Security upgrade ubuntu from latest to 22.04

[snyk-bot]

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 ubuntu:22.04, as this image has only 11 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	Issue	Exploit Maturity
	Out-of-bounds Read SNYK-UBUNTU2204-E2FSPROGS-2801319	No Known Exploit
	CVE-2021-46828 SNYK-UBUNTU2204-LIBTIRPC-2956571	No Known Exploit
	CVE-2021-46828 SNYK-UBUNTU2204-LIBTIRPC-2956571	No Known Exploit
	Inadequate Encryption Strength SNYK-UBUNTU2204-OPENSSL-2941376	No Known Exploit
	Improper Verification of Cryptographic Signature SNYK-UBUNTU2204-PERL-2789081	No Known Exploit

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[chayim]

Not relevant given our use case, closing