[StepSecurity] Apply security best practices (#4684)

Signed-off-by: StepSecurity Bot <bot@stepsecurity.io>

.github/workflows/dependency-review.yml

@@ -0,0 +1,27 @@
+# Dependency Review Action
+#
+# This Action will scan dependency manifest files that change as part of a Pull Request,
+# surfacing known-vulnerable versions of the packages declared or updated in the PR.
+# Once installed, if the workflow run is marked as required,
+# PRs introducing known-vulnerable packages will be blocked from merging.
+#
+# Source repository: https://github.com/actions/dependency-review-action
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@c6295a65d1254861815972266d5933fd6e532bdf # v2.11.1
+        with:
+          egress-policy: audit
+
+      - name: 'Checkout Repository'
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@67d4f4bd7a9b17a0db54d2a7519187c65e339de8 # v4

.github/workflows/helm.yml

@@ -81,6 +81,11 @@ jobs:
       github.ref == 'refs/heads/main' ||
       startsWith(github.ref, 'refs/heads/release-')
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@c6295a65d1254861815972266d5933fd6e532bdf # v2.11.1
+        with:
+          egress-policy: audit
+
       - name: Checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:

.github/workflows/publish.yml

@@ -44,6 +44,9 @@ env:
   DOCKERFILE: ${{ inputs.dockerfile }}
   IS_FORK: ${{ secrets.IS_FORK }}
 
+permissions:
+  contents: read
+
 jobs:
   build-publish:
     name: Build and Publish

.github/workflows/release.yml

@@ -15,6 +15,9 @@ on:
 env:
   IMAGE_NAME: ghcr.io/${{ github.repository }}
 
+permissions:
+  contents: read
+
 jobs:
   release:
     name: Create Release
@@ -22,6 +25,11 @@ jobs:
     permissions:
       contents: write # to create a release and push new docs
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@c6295a65d1254861815972266d5933fd6e532bdf # v2.11.1
+        with:
+          egress-policy: audit
+
       - name: Checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with: