run_first script improvements

[clpetersonucf]

run_first.sh is performing a docker compose pull but none of the images referenced in the base docker-compose.yml actually exist. This hasn't been an issue for us historically since the images are just built from source as a fallback. The script should be cleaned up to make this process better.

• Update the image: references in the base docker-compose file to point to the correct locations in the github package registry
• Add a tag to the app and webserver images to allow the above paths to always reference a latest version of a particular image.
• Provide an interactive option to allow the user select between pre-built packages (docker compose pull) vs building from source (docker compose build)
• Clean up unnecessary steps in the script (build_assets?)

Ideally, a newbie Materia user should be able to use run_first after a fresh clone of the repo with zero problems, regardless of whether they're pulling (faster) or building (better for dev)

[clpetersonucf]

Originally address in #1617 but there's more to do.