ci: add cron job to cache trivy db (#283)

Signed-off-by: Binbin Li <[email protected]>

.github/workflows/scan-vulns.yaml

@@ -33,9 +33,13 @@ jobs:
           check-latest: true
       - uses: golang/govulncheck-action@b625fbe08f3bccbe446d94fbf87fcc875a4f50ee # v1.0.4
 
+  restore_trivy_cache:
+    uses: ./.github/workflows/restore-trivy-cache.yml
+
   scan_vulnerabilities:
     name: "[Trivy] Scan for vulnerabilities"
     runs-on: ubuntu-22.04
+    needs: ["restore_trivy_cache"]
     timeout-minutes: 15
     env:
       TRIVY_VERSION: 0.49.1
@@ -54,21 +58,6 @@ jobs:
           wget https://github.com/aquasecurity/trivy/releases/download/v${{ env.TRIVY_VERSION }}/trivy_${{ env.TRIVY_VERSION }}_Linux-64bit.tar.gz
           tar zxvf trivy_${{ env.TRIVY_VERSION }}_Linux-64bit.tar.gz
           echo "$(pwd)" >> $GITHUB_PATH
-      
-      - name: Get current date
-        id: date
-        run: echo "date=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT
-
-      - name: Restore trivy cache directory
-        uses: actions/cache/restore@6849a6489940f00c2f30c0fb92c6274307ccb58a # v4.1.2
-        with:
-          path: ${{ github.workspace }}/.cache/trivy
-          key: cache-trivy-${{ steps.date.outputs.date }}
-
-      - name: Set up trivy cache directory
-        run: |
-          mkdir -p ~/.cache/trivy
-          cp -r ${{ github.workspace }}/.cache/trivy/db ~/.cache/trivy
 
       - name: Run trivy on git repository
         run: |