fix: run build and test on main branch (#168)

<!-- markdownlint-disable-next-line first-line-heading -->
## Description

Updated CI/CD pipelines to run the build and acceptance test stages on
the main branch after a PR has been created

## Context

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## Type of changes

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the boxes that apply. -->

- [ ] Refactoring (non-breaking change)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would change existing
functionality)
- [x] Bug fix (non-breaking change which fixes an issue)

## Checklist

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that apply. -->

- [x] I am familiar with the [contributing
guidelines](../docs/CONTRIBUTING.md)
- [x] I have followed the code style of the project
- [ ] I have added tests to cover my changes
- [ ] I have updated the documentation accordingly
- [ ] This PR is a result of pair or mob programming

---

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Author: csaw-nhs

.github/workflows/cicd-1-pull-request.yaml

@@ -103,7 +103,7 @@ jobs:
     name: "Build stage"
     needs: [metadata, test-stage]
     uses: ./.github/workflows/stage-3-build.yaml
-    if: needs.metadata.outputs.does_pull_request_exist == 'true' || (github.event_name == 'pull_request' && (github.event.action == 'opened' || github.event.action == 'reopened'))
+    if: github.ref == 'refs/heads/main' || needs.metadata.outputs.does_pull_request_exist == 'true' || (github.event_name == 'pull_request' && (github.event.action == 'opened' || github.event.action == 'reopened'))
     with:
       build_datetime: "${{ needs.metadata.outputs.build_datetime }}"
       build_timestamp: "${{ needs.metadata.outputs.build_timestamp }}"
@@ -117,7 +117,7 @@ jobs:
     name: "Acceptance stage"
     needs: [metadata, build-stage]
     uses: ./.github/workflows/stage-4-acceptance.yaml
-    if: needs.metadata.outputs.does_pull_request_exist == 'true' || (github.event_name == 'pull_request' && (github.event.action == 'opened' || github.event.action == 'reopened'))
+    if: github.ref == 'refs/heads/main' || needs.metadata.outputs.does_pull_request_exist == 'true' || (github.event_name == 'pull_request' && (github.event.action == 'opened' || github.event.action == 'reopened'))
     with:
       build_datetime: "${{ needs.metadata.outputs.build_datetime }}"
       build_timestamp: "${{ needs.metadata.outputs.build_timestamp }}"