[Snyk] Security upgrade alpine from 3.12.0 to 3.12

[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 alpine:3.12, 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
	571	Improper Handling of Exceptional Conditions SNYK-ALPINE312-BUSYBOX-1089799	No Known Exploit
	571	Improper Handling of Exceptional Conditions SNYK-ALPINE312-BUSYBOX-1089799	No Known Exploit
	500	Integer Overflow or Wraparound SNYK-ALPINE312-OPENSSL-1075735	No Known Exploit
	571	Improper Certificate Validation SNYK-ALPINE312-OPENSSL-1089238	No Known Exploit
	571	Improper Certificate Validation SNYK-ALPINE312-OPENSSL-1089238	No Known Exploit

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[sonarqubecloud]

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0 Bugs
0 Vulnerabilities
0 Security Hotspots
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