Add dependency vulnerability alerts

Signed-off-by: Bryan Frimin <bryan@frimin.fr>

controls/application-security/source-code/COD-003_dependancy_vulnerability_alerts.md

@@ -0,0 +1,33 @@
+---
+id: "APP-SRC-003"
+category: "application-security/source-code"
+revision-version: 1
+revision-date: "2024-01-07"
+estimate-time: "15m"
+frameworks:
+    - name: "soc2"
+      sections: ["CC4.1", "CC8.1"]
+---
+
+## Purpose
+It ensures your project stays secure and up-to-date without manual
+tracking of dependencies. It also reduces the risk of using outdated
+or insecure libraries in your codebase.
+
+## Implementation
+
+### Github
+
+1. Go to your repository on GitHub.
+2. Click on the "Settings" tab.
+3. On the left sidebar, click "Security & analysis".
+4. Under "Dependabot alerts", ensure "Dependency graph" and
+   "Dependabot security updates" are enabled.
+5. GitHub will now alert you to any vulnerable dependencies and
+   automatically open pull requests to fix them.
+
+## Evidence
+- Screenshot of Dependabot configuration screen
+- Sample of dependency update PRs
+- Vulnerability alert history
+