feat: add scheduled security audits

.github/workflows/scheduled-security-audit.yaml

@@ -0,0 +1,77 @@
+name: Security Audits
+on:
+  schedule:
+    - cron: '0 0 * * *'  # every day at midnight
+  workflow_dispatch: # allow manual execution
+
+env:
+  IMAGE_NAME: rouhim/sons-of-the-forest-server
+  IMAGE_TAG: latest
+
+jobs:
+  image-audit:
+    name: Audit container image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Run Trivy vulnerability scanner
+        uses: aquasecurity/trivy-action@master
+        with:
+          image-ref: 'docker.io/${{ env.IMAGE_NAME }}:${{ env.IMAGE_TAG }}'
+          format: 'sarif'
+          output: 'trivy-results.sarif'
+          exit-code: '0'
+          ignore-unfixed: true
+          severity: 'CRITICAL,HIGH'
+
+      - name: Upload Trivy scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: 'trivy-results.sarif'
+
+  filesystem-audit:
+    name: Audit repo filesystem
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Run Trivy vulnerability scanner
+        uses: aquasecurity/trivy-action@master
+        with:
+          scan-type: 'fs'
+          format: 'sarif'
+          output: 'trivy-results.sarif'
+          exit-code: '0'
+          ignore-unfixed: true
+          severity: 'CRITICAL,HIGH'
+
+      - name: Upload Trivy scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: 'trivy-results.sarif'
+
+  config-audit:
+    name: Audit config files
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Run Trivy vulnerability scanner
+        uses: aquasecurity/trivy-action@master
+        with:
+          scan-type: 'config'
+          hide-progress: false
+          format: 'sarif'
+          output: 'trivy-results.sarif'
+          exit-code: '0'
+          ignore-unfixed: true
+          severity: 'CRITICAL,HIGH'
+
+      - name: Upload Trivy scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: 'trivy-results.sarif'