Security upgrade golang from 1.18.1-alpine to 1.18.9-alpine

[xiabee]

Enhancement

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

• br/docker/Dockerfile

We recommend upgrading to golang:1.18.9-alpine, 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
	300	Inadequate Encryption StrengthSNYK-ALPINE315-OPENSSL-2941810	No Known Exploit
	300	Inadequate Encryption StrengthSNYK-ALPINE315-OPENSSL-2941810	No Known Exploit
	500	Out-of-bounds WriteSNYK-ALPINE315-ZLIB-2976173	No Known Exploit

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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
br/docker/Dockerfile
We recommend upgrading to golang:1.18.9-alpine, 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: