feat: add setup-db (#11)

Reviewed-on: t.behrendt/trivy-actions#11 Reviewed-by: branch-buddy <branch-buddy@t00n.de> Co-authored-by: Timo Behrendt <t.behrendt@t00n.de> Co-committed-by: Timo Behrendt <t.behrendt@t00n.de>
2025-11-08 17:31:15 +01:00
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+# Setup DB Action
+
+A reusable Gitea Action that sets up the Trivy vulnerability database, restoring from cache if available.
+
+**Note:** This action only sets up the database. Trivy itself must be installed separately (e.g., using the `setup-trivy` action).
+
+## Usage
+
+### Basic Usage
+
+```yaml
+- name: Setup DB
+  uses: https://gitea.t000-n.de/t.behrendt/trivy-actions/setup-db@0.0.1
+```
+
+### Complete Example
+
+```yaml
+name: Security Scan
+on: [push, pull_request]
+
+jobs:
+  security:
+    runs-on:
+      - ubuntu-latest
+      - linux_amd64
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Trivy
+        uses: https://gitea.t000-n.de/t.behrendt/trivy-actions/setup-trivy@0.0.1
+        with:
+          version: "v0.66.0"
+          architecture: "amd64"
+      - name: Setup DB
+        uses: https://gitea.t000-n.de/t.behrendt/trivy-actions/setup-db@0.0.1
+      - name: Scan for vulnerabilities
+        run: trivy fs .
+```
+
+## Inputs
+
+| Input       | Description                       | Required | Default          |
+| ----------- | --------------------------------- | -------- | ---------------- |
+| `cache-dir` | Path to the Trivy cache directory | No       | `~/.cache/trivy` |