Always attach test results to PR builds

Previously the test results were only attached to passing builds, which is, like, the opposite of useful.

Also finally figured out how to nerf the local docker layer cache.
Recorded this new knowledge as make commands.

.github/workflows/ci-workflow.yml

@@ -44,7 +44,8 @@ jobs:
       - name: Make build
         run: make build
       - name: Publish Test Report
-        uses: scacap/action-surefire-report@v1.0.7
+        uses: scacap/action-surefire-report@v1.0.9
+        if: ${{ always() }}
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           report_paths: '**/target/surefire-reports/TEST-*.xml'

Makefile

@@ -16,6 +16,9 @@ clean:
 	docker rm -fv build-container-dbg
 	docker rm -fv build-container
 
+clean-layer-cache:
+	docker builder prune -f -a
+
 build: image
 	docker create --name build-container netty-incubator-buffer:build
 	mkdir -p target/container-output
@@ -23,3 +26,5 @@ build: image
 	docker wait build-container || (docker cp build-container:/home/build target/container-output && false)
 	docker cp build-container:/home/build/target .
 	docker rm build-container
+
+rebuild: clean clean-layer-cache build