Adding nightly testing

Author: Robert Bradley

.github/workflows/tests.yml

@@ -1,6 +1,12 @@
 name: Unit and Integration testing
 
 on:
+  pull_request:
+    branches:
+        - main
+  push:
+    branches:
+        - main
   workflow_dispatch:
   schedule:
     - cron: '0 3 * * *'  # Runs nightly at 3 AM UTC