[Snyk] Security upgrade redis from 6.2.1 to 6.2.7

[gkorland]

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 redis:6.2.7, as this image has only 44 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
	714	Directory Traversal SNYK-DEBIAN10-DPKG-2847944	No Known Exploit
	514	Use of a Broken or Risky Cryptographic Algorithm SNYK-DEBIAN10-LIBGCRYPT20-1582894	No Known Exploit
	500	Buffer Overflow SNYK-DEBIAN10-OPENSSL-1569403	No Known Exploit
	511	Loop with Unreachable Exit Condition ('Infinite Loop') SNYK-DEBIAN10-OPENSSL-2426310	No Known Exploit
	500	OS Command Injection SNYK-DEBIAN10-OPENSSL-2807585	No Known Exploit

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