Applies code to avoid conflicts between code coverage reports

...generated by parallel CI nodes, according to documentation here: https://docs.knapsackpro.com/ruby/simplecov/

Sets upload-artifact code on build file - for controllers

.github/workflows/build.yml

@@ -32,6 +32,7 @@ jobs:
           POSTGRES_DB: open_food_network_test
           POSTGRES_USER: ofn
           POSTGRES_PASSWORD: f00d
+
     strategy:
       fail-fast: false
       matrix:
@@ -86,6 +87,15 @@ jobs:
           git show --no-patch # the commit being tested (which is often a merge due to actions/checkout@v3)
           bin/rake knapsack_pro:rspec
 
+      - name: Save SimpleCov file
+        uses: actions/upload-artifact@v3
+        with:
+          name: simple-cov-output-files
+          path: coverage/*.*
+          retention-days: 7
+          if-no-files-found: ignore
+
+
   models:
     runs-on: ubuntu-22.04
     services:
@@ -484,4 +494,4 @@ jobs:
         run: bin/rake karma:run
 
       - name: Run jest tests
-        run: yarn jest
+        run: yarn jest