expose build SHA (#27542)

* expose build SHA

* dbg

* dbg

* dbg

* sub

* oops

* oops

* try this

* debugging

* debugging

* debugging

* debugging

* debugging

* without quotes

* typo

* typo

* singular

* mention in Dockerfile

* plural

* does this work

* does this work

* tidying up

* no cache

* Update middleware/index.js

Co-authored-by: Kevin Heis <heiskr@users.noreply.github.com>

Co-authored-by: Kevin Heis <heiskr@users.noreply.github.com>

.github/workflows/azure-preview-env-deploy.yml

@@ -187,6 +187,8 @@ jobs:
           cache-from: type=registry,ref=${{ secrets.NONPROD_REGISTRY_SERVER }}/${{ github.repository }}:main-preview
           # `main-docker-cache.yml` handles updating the remote cache so we don't pollute it with PR specific code
           cache-to: ''
+          build-args: |
+            BUILD_SHA=${{ github.sha }}
 
       # Succeed despite any non-zero exit code (e.g. if there is no deployment to cancel)
       - name: 'Cancel any existing deployments for this PR'

.github/workflows/azure-prod-build-deploy.yml

@@ -85,6 +85,8 @@ jobs:
           tags: ${{ env.DOCKER_IMAGE }}, ${{ env.DOCKER_IMAGE_CACHE_REF }}
           cache-from: type=registry,ref=${{ env.DOCKER_IMAGE_CACHE_REF }}
           cache-to: type=registry,mode=max,ref=${{ env.DOCKER_IMAGE_CACHE_REF }}
+          build-args: |
+            BUILD_SHA=${{ github.sha }}
 
       - name: 'Update docker-compose.prod.yaml template file'
         run: |