MOD: upgrade 8.5.2 with openjdk:17-alpine&Mysql8-connector

[jianhong-li]

Issue #, if available:

Description of changes:

1. Update the base Docker image from jdk8 to jdk17,because confluence does not support JDK8 anymore from version 8.0 ;
2. update mysql driver to mysql8-connector , as confluence 8.x does not support mysql5.7 anymore. I choose connector vrsion 8.0.28 beause myql change utf8 encoding and this may produce potential bug.

this is confluence doc: There is a known issue when running Confluence with MySQL 8.0.29 and later due to a change to the UTF8 alias in MySQL. We're working on a fix, but if you have Confluence 7.3 or later, you can change the character set and collation to UTF8MB4 to avoid this issue. See How to Fix the Collation and Character Set of a MySQL Database manually.

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