Harden GitHub workflows

.github/dependabot.yml

@@ -0,0 +1,11 @@
+version: 2
+updates:
+  # Maintain dependencies for GitHub Actions.
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    cooldown:
+      default-days: 7
+    ignore:
+      - dependency-name: "yiisoft/*"

.github/workflows/docker.yml

@@ -3,7 +3,7 @@
 permissions:
   contents: read
 
 on:
   pull_request: &ignore-paths
     paths-ignore:
       - ".bowerrc"
@@ -25,12 +25,14 @@
   push: *ignore-paths
 
 jobs:
   apache:
     runs-on: ubuntu-latest
 
     steps:
       - name: Checkout.
-        uses: actions/checkout@v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
+        with:
+          persist-credentials: false
 
       - name: Build and start containers.
         run: docker compose up -d --build --wait

.github/workflows/zizmor.yml

@@ -0,0 +1,22 @@
+name: GitHub Actions Security Analysis with zizmor 🌈
+
+on:
+  push:
+    branches:
+      - master
+      - main
+    paths:
+      - '.github/**.yml'
+      - '.github/**.yaml'
+  pull_request:
+    paths:
+      - '.github/**.yml'
+      - '.github/**.yaml'
+
+permissions:
+  actions: read # Required by zizmor when reading workflow metadata through the API.
+  contents: read # Required to read workflow files.
+
+jobs:
+  zizmor:
+    uses: yiisoft/actions/.github/workflows/zizmor.yml@master