adding rubocop, also removing rails env for rspec since rails is not used

Author: David Zuckerman

.github/workflows/build.yml

@@ -138,7 +138,12 @@ jobs:
       - name: Run RSpec
         if: ${{ always() }}
         run: |
-          docker compose exec -e RAILS_ENV=test app rspec --format progress --format html --out artifacts/rspec.html
+          docker compose exec app rspec --format progress --format html --out artifacts/rspec.html
+
+        - name: Run Rubocop
+        if: ${{ always() }}
+        run: |
+          docker compose exec app rubocop --format progress --format html --out artifacts/rubocop.html
 
       - name: Copy out artifacts
         if: ${{ always() }}