feat(security): add Trivy security scans for Docker images and source code

.github/workflows/trivy_security_scans.yml

@@ -0,0 +1,52 @@
+name: Trivy Security Scans
+
+on:
+  push:
+    branches:
+      - main
+      - development
+  pull_request:
+    branches:
+      - main
+      - development
+  schedule:
+    - cron: "0 8 * * 1" # Weekly scan on Mondays at 8 AM UTC
+
+jobs:
+  trivy-scan:
+    name: Trivy Filesystem & Docker Image Scan
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx (for consistent image builds)
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GitHub Container Registry (optional, if pushing images)
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build Docker image
+        run: docker build -t adventurelog:latest .
+
+      - name: Scan Docker image with Trivy
+        uses: aquasecurity/trivy-action@master
+        with:
+          image-ref: adventurelog:latest
+          format: table
+          exit-code: 1
+          ignore-unfixed: true
+
+      - name: Scan source code (Filesystem) with Trivy
+        uses: aquasecurity/trivy-action@master
+        with:
+          scan-type: fs
+          scan-ref: .
+          format: table
+          exit-code: 1
+          ignore-unfixed: true