Use `latest` OL runtime image in build

[natalie-bernhard]

Is there a reason we do not use the latest image tag when pulling the OL runtime image into our Dockerfile? If not, doing so would allow us to automate OL runtime updates.

[natalie-bernhard]

Reach out to Annie or Kin to confirm this was not avoided for a specific reason

[natalie-bernhard]

This is currently blocked by #3022 due to the fact that the website does not run on the newest version of Java SE, which is what the latest image uses.