chore: update dependabot config and pin Docker images (#15194)

.github/dependabot.yaml

@@ -51,7 +51,13 @@ updates:
 
   # Update our Dockerfile.
   - package-ecosystem: "docker"
-    directory: "/scripts/"
+    directories:
+      - "/dogfood/contents"
+      - "/scripts"
+      - "/examples/templates/docker/build"
+      - "/examples/parameters/build"
+      - "/scaletest/templates/scaletest-runner"
+      - "/scripts/ironbank"
     schedule:
       interval: "weekly"
       time: "06:00"
@@ -68,6 +74,9 @@ updates:
     directories:
       - "/site"
       - "/offlinedocs"
+      - "/scripts"
+      - "/scripts/apidocgen"
+
     schedule:
       interval: "monthly"
       time: "06:00"

.github/workflows/pr-deploy.yaml

@@ -216,6 +216,11 @@ jobs:
       DOCKER_CLI_EXPERIMENTAL: "enabled"
       CODER_IMAGE_TAG: ${{ needs.get_info.outputs.CODER_IMAGE_TAG }}
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
       - name: Checkout
         uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
         with:
@@ -267,6 +272,11 @@ jobs:
       PR_URL: ${{ needs.get_info.outputs.PR_URL }}
       PR_HOSTNAME: "pr${{ needs.get_info.outputs.PR_NUMBER }}.${{ secrets.PR_DEPLOYMENTS_DOMAIN }}"
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
       - name: Set up kubeconfig
         run: |
           set -euo pipefail