Documentation for docker image update outdated?

[Colin Blaise]

I found this page, https://confluence.atlassian.com/confkb/update-the-confluence-docker-image-to-use-oracle-jdk-829062521.html.  

I am attempting to update my confluence:6.8 image to confluence:6.14.

My confluence:6.8 container works fine and I followed the instructions in the above link.  However, I ran into a bunch of errors when attempting to upgrade to 6.14.

I pulled down the latest code to build the image locally, however the Dockerfile did not match the instructions in the link above.

Specifically, the docker file does not have

RUN apk update -qq \
    && update-ca-certificates \
    && apk add ca-certificates wget curl openssh bash procps openssl perl ttf-dejavu tini libc6-compat \
    && rm -rf /var/lib/{apt,dpkg,cache,log}/ /tmp/* /var/tmp/*

Maybe I am pulling the wrong tag from bitbucket?  If so, which tag should I be pulling down?

Thanks in advance for any help with this issue.