Dockerfile uses EOL Ubuntu 18.04

[codygarver]

Summary

Ubuntu Trusty was EOL a few months ago, Dockerfile should be rebased to newer Ubuntu version

Version

4.3.0 (Current)

Expected Behavior

Use currently supported Ubuntu version

Actual Behavior

Uses unsupported Ubuntu version

Steps to Reproduce the Actual Behavior

Observe Dockerfile is using ubuntu 18.04

Related Work

No response