chore: Apply security best practices

.github/dependabot.yml

@@ -71,3 +71,48 @@ updates:
       - "docker"
     commit-message:
       prefix: "chore(devcontainer)"
+
+  - package-ecosystem: docker
+    directory: /.ci
+    schedule:
+      interval: daily
+
+  - package-ecosystem: docker
+    directory: /.devcontainer
+    schedule:
+      interval: daily
+
+  - package-ecosystem: npm
+    directory: /lambdas/functions/ami-housekeeper
+    schedule:
+      interval: daily
+
+  - package-ecosystem: npm
+    directory: /lambdas/functions/control-plane
+    schedule:
+      interval: daily
+
+  - package-ecosystem: npm
+    directory: /lambdas/functions/gh-agent-syncer
+    schedule:
+      interval: daily
+
+  - package-ecosystem: npm
+    directory: /lambdas/functions/termination-watcher
+    schedule:
+      interval: daily
+
+  - package-ecosystem: npm
+    directory: /lambdas/functions/webhook
+    schedule:
+      interval: daily
+
+  - package-ecosystem: npm
+    directory: /lambdas/libs/aws-powertools-util
+    schedule:
+      interval: daily
+
+  - package-ecosystem: npm
+    directory: /lambdas/libs/aws-ssm-util
+    schedule:
+      interval: daily

.github/workflows/codeql.yml

@@ -10,6 +10,9 @@ on:
   schedule:
     - cron: '25 19 * * 2'
 
+permissions:
+  contents: read
+
 jobs:
   analyze:
     name: Analyze (${{ matrix.language }})
@@ -24,6 +27,11 @@ jobs:
         language: ['javascript-typescript', 'actions']
 
     steps:
+    - name: Harden the runner (Audit all outbound calls)
+      uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
+      with:
+        egress-policy: audit
+
     - name: Checkout repository
       uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       with:

.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@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
+        with:
+          egress-policy: audit
+
+      - name: 'Checkout Repository'
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@da24556b548a50705dd671f47852072ea4c105d9 # v4.7.1

.github/workflows/lambda.yml

@@ -24,6 +24,11 @@ jobs:
         working-directory: ./lambdas
 
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
+        with:
+          egress-policy: audit
+
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           persist-credentials: false

.github/workflows/ossf-scorecard.yml

@@ -19,6 +19,11 @@ jobs:
       id-token: write
 
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
+        with:
+          egress-policy: audit
+
       - name: "Checkout code"
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:

.github/workflows/packer-build.yml

@@ -28,6 +28,11 @@ jobs:
       run:
         working-directory: images/${{ matrix.image }}
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
+        with:
+          egress-policy: audit
+
       - name: "Checkout"
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:

.github/workflows/release.yml

@@ -6,6 +6,9 @@ on:
       - v1
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   release:
     name: Release
@@ -16,6 +19,11 @@ jobs:
       id-token: write
       attestations: write
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
+        with:
+          egress-policy: audit
+
       - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version: 22

.github/workflows/semantic-check.yml

@@ -13,6 +13,11 @@ jobs:
     name: Semantic Commit Message Check
     runs-on: ubuntu-latest
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
+        with:
+          egress-policy: audit
+
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           persist-credentials: false

.github/workflows/stale.yml

@@ -10,6 +10,11 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
+        with:
+          egress-policy: audit
+
       - uses: actions/stale@5bef64f19d7facfb25b37b414482c7164d639639 # v9.1.0
         with:
           stale-issue-message: >

.github/workflows/terraform.yml

@@ -21,6 +21,11 @@ jobs:
     container:
       image: hashicorp/terraform:${{ matrix.terraform }}
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
+        with:
+          egress-policy: audit
+
       - name: "Checkout"
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
@@ -90,6 +95,11 @@ jobs:
     container:
       image: hashicorp/terraform:${{ matrix.terraform }}
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
+        with:
+          egress-policy: audit
+
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           persist-credentials: false
@@ -148,6 +158,11 @@ jobs:
     container:
       image: hashicorp/terraform:${{ matrix.terraform }}
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
+        with:
+          egress-policy: audit
+
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           persist-credentials: false

.github/workflows/update-docs.yml

@@ -6,6 +6,9 @@ on:
       - "**/*.md"
       - ".github/workflows/update-docs.yml"
 
+permissions:
+  contents: read
+
 jobs:
   docs:
     name: Auto update terraform docs
@@ -14,6 +17,11 @@ jobs:
       contents: write
       pull-requests: write
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
+        with:
+          egress-policy: audit
+
       - name: Checkout with GITHUB Action token
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
@@ -58,6 +66,11 @@ jobs:
     permissions:
       contents: write
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
+        with:
+          egress-policy: audit
+
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Configure Git Credentials
         run: |