Update trivydb cache on the begging of each day (#3821)

Signed-off-by: maksim.nabokikh <max.nabokih@gmail.com>

.github/workflows/artifacts.yaml

@@ -199,7 +199,7 @@ jobs:
         run: echo "date=$(date +%Y-%m-%d)" >> $GITHUB_OUTPUT
 
       - name: Restore trivy cache
-        uses: actions/cache@6849a6489940f00c2f30c0fb92c6274307ccb58a # 4.1.2
+        uses: actions/cache@6849a6489940f00c2f30c0fb92c6274307ccb58a # v4.1.2
         with:
           path: cache/db
           key: trivy-cache-${{ steps.date.outputs.date }}

.github/workflows/trivydb-cache.yaml

+# Note: This workflow only updates the cache. You should create a separate workflow for your actual Trivy scans.
+# In your scan workflow, set TRIVY_SKIP_DB_UPDATE=true and TRIVY_SKIP_JAVA_DB_UPDATE=true.
+name: Update Trivy Cache
+
+on:
+  schedule:
+    - cron: '0 0 * * *'  # Run daily at midnight UTC
+  workflow_dispatch:  # Allow manual triggering
+
+jobs:
+  update-trivy-db:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup oras
+        uses: oras-project/setup-oras@9c92598691bfef1424de2f8fae81941568f5889c # v1.2.1
+
+      - name: Get current date
+        id: date
+        run: echo "date=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT
+
+      - name: Download and extract the vulnerability DB
+        run: |
+          mkdir -p $GITHUB_WORKSPACE/.cache/trivy/db
+          oras pull ghcr.io/aquasecurity/trivy-db:2
+          tar -xzf db.tar.gz -C $GITHUB_WORKSPACE/.cache/trivy/db
+          rm db.tar.gz
+
+      - name: Download and extract the Java DB
+        run: |
+          mkdir -p $GITHUB_WORKSPACE/.cache/trivy/java-db
+          oras pull ghcr.io/aquasecurity/trivy-java-db:1
+          tar -xzf javadb.tar.gz -C $GITHUB_WORKSPACE/.cache/trivy/java-db
+          rm javadb.tar.gz
+
+      - name: Cache DBs
+        uses: actions/cache/save@6849a6489940f00c2f30c0fb92c6274307ccb58a # v4.1.2
+        with:
+          path: ${{ github.workspace }}/.cache/trivy
+          key: cache-trivy-${{ steps.date.outputs.date }}