Equipment scraper fix + workflow pruning command fix

[JoshD94]

Overview

Equipment scraper had a bug, fixed the scraper.
Workflow pruning command doesn't prune dangling/unused images, fixed command.

Changes Made

• The scraper bug was because Noyes' equipment table changed a little bit, used to depend on even rows. Now scrapes based off th and td tags.
• Workflow was previously changed to 'docker system prune -f', this doesn't prune dangling/unused images that are not referenced. Changed to 'docker images prune -a' and pipeline a yes to confirm. This will prune dangling/unused images, which are created everytime we deploy because we pull a newer version of the image.

Test Coverage

Tested scraper locally. Tested pruning on dev server.

[cejiogu]

lgtm