[Snyk] Security upgrade tomcat from 8.5.21 to 8.5.94

[MichaelStoneSnyk]

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 tomcat:8.5.94, as this image has only 36 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
	522	Out-of-bounds Write SNYK-DEBIAN9-FREETYPE-1019584	Mature
	545	Buffer Overflow SNYK-DEBIAN9-INETUTILS-564742	No Known Exploit
	513	Integer Overflow or Wraparound SNYK-DEBIAN9-SQLITE3-307593	No Known Exploit
	459	Out-of-bounds Write SNYK-DEBIAN9-TIFF-406065	No Known Exploit
	406	Out-of-Bounds SNYK-DEBIAN9-WGET-300458	No Known Exploit

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