Update Dockerfile

[JMante1]

Changed the base image to be more up to date based on NIST recommendations

[JMante1]

for some reason the newer docker image can't install python using apk. Not sure what is going on

[JMante1]

This is the command that is failing: apk add nss git openjdk8-jre openjdk8 maven python alpine-sdk libxml2-dev yarn g++ gcc bash raptor2 jq

[cjmyers]

Looks like docker build is failing.

[cjmyers]

Could one of those applications not be available for this new OS?