ci: pin actions to commit SHAs, add Trivy, Dependabot and release-please

.github/dependabot.yml

@@ -0,0 +1,12 @@
+version: 2
+updates:
+  # Third-party actions and the platform-workflows reusable workflow (SHA pins with version comments).
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: weekly
+    commit-message:
+      prefix: "ci"
+    groups:
+      github-actions:
+        patterns: ["*"]

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
   validate:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
 
       - name: install promtool, jsonnet, jb
         run: |
@@ -35,7 +35,7 @@ jobs:
       - name: make ci
         run: make ci
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: dashboards
           path: build/dashboards/*.json
@@ -46,8 +46,8 @@ jobs:
       run:
         working-directory: deploy/terraform
     steps:
-      - uses: actions/checkout@v4
-      - uses: hashicorp/setup-terraform@v3
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: hashicorp/setup-terraform@b9cd54a3c349d3f38e8881555d616ced269862dd # v3.1.2
       - run: terraform fmt -check
       - run: terraform init -backend=false -input=false
       - run: terraform validate

.github/workflows/release-please.yml

@@ -0,0 +1,18 @@
+name: release-please
+
+on:
+  push:
+    branches: [main]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: googleapis/release-please-action@45996ed1f6d02564a971a2fa1b5860e934307cf7 # v5.0.0
+        with:
+          config-file: release-please-config.json
+          manifest-file: .release-please-manifest.json

.github/workflows/security.yml

@@ -0,0 +1,22 @@
+name: security
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+  schedule:
+    - cron: "17 6 * * 1" # weekly, catches newly published advisories
+
+permissions:
+  contents: read
+
+jobs:
+  trivy:
+    uses: Krustytoe/platform-workflows/.github/workflows/trivy-scan.yml@a8f5915241bbd0c5639a81428fca888cc2b79da6 # v0.1.0
+    permissions:
+      contents: read
+      security-events: write
+    with:
+      scan_type: config
+      target: .
+      severity: HIGH,CRITICAL

.release-please-manifest.json

@@ -0,0 +1,3 @@
+{
+  ".": "0.1.0"
+}

release-please-config.json

@@ -0,0 +1,10 @@
+{
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
+  "packages": {
+    ".": {
+      "release-type": "simple",
+      "include-component-in-tag": false,
+      "changelog-path": "CHANGELOG.md"
+    }
+  }
+}