govulncheck-action: fix path to Containerfile (#160)

I thought that it would be relative to the specific `context`, but it appears [it is not](https://github.com/codeready-toolchain/toolchain-cicd/actions/runs/20071545487/job/57574739655)

---------

Signed-off-by: Xavier Coulon <xcoulon@redhat.com>

Author: xcoulon

.github/workflows/govulncheck-action-publish.yml

@@ -5,9 +5,11 @@ on:
     - master
     paths:
     - 'govulncheck-action/**'
+    - '.github/workflows/govulncheck-action-*.yml'
 
 jobs:
   build-image:
+    name: Build and push image
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout code
@@ -24,7 +26,7 @@ jobs:
           image: codeready-toolchain/govulncheck-action
           tags: latest ${{ env.COMMIT_SHORT_SHA }}
           context: govulncheck-action
-          containerfiles: Containerfile
+          containerfiles: govulncheck-action/Containerfile
 
       - name: Log into quay.io
         uses: redhat-actions/podman-login@v1

govulncheck-action/internal/govulncheck/scan.go

@@ -35,15 +35,15 @@ func DefaultScan(stderr io.Writer) ScanFunc {
 		logger.Info("scanning for vulnerabilities", "path", path)
 		info, err := os.Stat(path)
 		if err != nil {
-			return nil, fmt.Errorf("invalid scan path: %w", err)
+			return nil, fmt.Errorf("invalid scan path '%s': %w", path, err)
 		}
 		if !info.IsDir() {
-			return nil, fmt.Errorf("path is not a directory: %w", err)
+			return nil, fmt.Errorf("path '%s' is not a directory: %w", path, err)
 		}
 		if logger.Enabled(ctx, slog.LevelDebug) {
 			files, err := os.ReadDir(path)
 			if err != nil {
-				return nil, fmt.Errorf("failed to read directory: %w", err)
+				return nil, fmt.Errorf("failed to read directory '%s': %w", path, err)
 			}
 			for _, file := range files {
 				logger.Debug(file.Name())