fix: cache dir

setup-db/action.yaml

@@ -7,9 +7,9 @@ branding:
 
 inputs:
   cache-dir:
-    description: "Path to the Trivy cache directory (default: ${{runner.temp}}/trivy)"
+    description: "Path to the Trivy cache directory (default: under the workspace so Docker bind mounts work on containerized runners)"
     required: false
-    default: "${{ runner.temp }}/trivy"
+    default: "${{ github.workspace }}/.trivy-cache"
   trivy-version:
     description: "Trivy docker image version to use (full image reference including digest is recommended)"
     required: false
@@ -23,6 +23,9 @@ outputs:
 runs:
   using: "composite"
   steps:
+    - name: Ensure cache directory exists
+      shell: bash
+      run: mkdir -p "${{ inputs.cache-dir }}"
     - id: current-date
       shell: bash
       run: |