ci: drop explicit container image, use runner default (has node)

.gitea/workflows/validate.yml

@@ -9,23 +9,21 @@ on:
 jobs:
   build-and-test:
     runs-on: ubuntu-latest
-    container:
-      image: ubuntu:24.04
 
     steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
       - name: Install build dependencies
         run: |
-          apt-get update
+          sudo apt-get update
-          apt-get install -y --no-install-recommends \
+          sudo apt-get install -y --no-install-recommends \
             build-essential gcc make \
             cppcheck \
             lcov \
             python3 python3-pip \
             git ca-certificates
-          pip3 install --break-system-packages doorstop || true
+          pip3 install --break-system-packages doorstop || pip3 install doorstop || true
-
-      - name: Checkout
-        uses: actions/checkout@v4
 
       - name: Static Analysis (Cppcheck)
         run: make static
@@ -43,7 +41,7 @@ jobs:
       - name: Doorstop Check
         run: |
           if [ -f .doorstop.yml ]; then
-            doorstop || echo "Doorstop not fully configured"
+            doorstop || echo "Doorstop check produced warnings"
           fi
 
       - name: Upload Coverage HTML
@@ -53,9 +51,9 @@ jobs:
           name: coverage-html
           path: build/coverage-html/
 
-      - name: Upload Cppcheck Report
+      - name: Upload Test Results
         uses: actions/upload-artifact@v3
         if: always()
         with:
-          name: cppcheck-report
+          name: test-output
-          path: build/cppcheck-report.xml
+          path: build/