fix image builds in CI

Signed-off-by: Andy Sadler <ansadler@redhat.com>

.github/workflows/push.yaml

@@ -3,7 +3,7 @@ name: Build container images
 on: # yamllint disable-line rule:truthy
   push:
     branches: [main]
-  pull_request:
+  pull_request_target:
     types: [opened, synchronize, reopened, ready_for_review]
 
 env:
@@ -24,7 +24,7 @@ jobs:
     steps:
       - name: Checkout Git Repository
         uses: actions/checkout@v4
-        if: ${{ github.event_name == 'pull_request' }}
+        if: ${{ github.event_name == 'pull_request_target' }}
         with:
           ref: ${{ github.event.pull_request.head.ref }}
           repository: ${{ github.event.pull_request.head.repo.full_name }}
@@ -42,24 +42,23 @@ jobs:
           go-version: ${{ env.GO_VERSION }}
           cache: false
 
-      - name: Determine image tag
+      - name: Build image
         id: tag
         run: |
           if [[ "${GITHUB_EVENT_NAME}" -eq "pull_request_target" ]]; then
-            echo "tag=${{ matrix.image_base }}:pr-${{ github.event.pull_request.number }}-${GITHUB_SHA:0:8}" >> ${GITHUB_OUTPUT}
+            export IMG="${{ matrix.image_base }}:pr-${{ github.event.pull_request.number }}-${GITHUB_SHA:0:8}"
           else
-            echo "tag=${{ matrix.image_base }}:${GITHUB_SHA:0:8}" >> ${GITHUB_OUTPUT}
+            export IMG="${{ matrix.image_base }}:${GITHUB_SHA:0:8}"
           fi
+          echo "tag=${IMG}" >> ${GITHUB_OUTPUT}
+          make -C "${{ matrix.directory }}" docker-build
 
-      - name: Build image
+      - name: Tag image with :latest
+        if: ${{ github.event_name == 'push' }}
         env:
           LATEST: ${{ matrix.image_base }}:latest
           IMG: ${{ steps.tag.outputs.tag }}
-        run: |
-          make -C "${{ matrix.directory }}" docker-build
-          if [[ "${GITHUB_EVENT_NAME}" -eq "push" ]]; then
-            docker tag "${IMG}" "${LATEST}"
-          fi
+        run: docker tag "${IMG}" "${LATEST}"
 
       - name: Login to Quay
         uses: docker/login-action@v3
@@ -69,5 +68,4 @@ jobs:
           password: ${{ secrets.QUAY_TOKEN }}
 
       - name: Push images
-        run: |
-          docker push -a ${{ matrix.image_base }}
+        run: docker push -a ${{ matrix.image_base }}