[Snyk] Security upgrade alpine from 3.16.0 to 3

[danbao]

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

• jdk8/Dockerfile

We recommend upgrading to alpine:3, as this image has only 0 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
	400	Use After Free SNYK-ALPINE316-BUSYBOX-2953070	No Known Exploit
	400	Use After Free SNYK-ALPINE316-BUSYBOX-2953070	No Known Exploit
	400	Inadequate Encryption Strength SNYK-ALPINE316-OPENSSL-2941806	No Known Exploit
	400	Inadequate Encryption Strength SNYK-ALPINE316-OPENSSL-2941806	No Known Exploit
	221	CVE-2022-37434 SNYK-ALPINE316-ZLIB-2976176	No Known Exploit

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