diff --git a/.github/workflows/docker-build.yml b/.github/workflows/docker-build.yml
index 037819a..f122130 100644
--- a/.github/workflows/docker-build.yml
+++ b/.github/workflows/docker-build.yml
@@ -14,10 +14,12 @@ jobs:
   validate-compose:
     name: Validate Docker Compose
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Validate docker-compose.yml syntax
         run: |
@@ -46,7 +48,7 @@ jobs:
 
       - name: Check for leaked secrets
         run: |
-          if git ls-files | xargs grep -l "CHANGE_ME" | grep -v ".env.example" | grep -v ".github/workflows/"; then
+          if git ls-files | xargs grep -l "CHANGE_ME" | grep -v ".env.example" | grep -v ".github/workflows/" | grep -v "Makefile"; then
             echo "❌ Found placeholder passwords in tracked files"
             exit 1
           fi
@@ -62,14 +64,14 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
 
       - name: Log in to GitHub Container Registry
         if: github.event_name != 'pull_request'
-        uses: docker/login-action@v3
+        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
@@ -77,7 +79,7 @@ jobs:
 
       - name: Extract metadata for Docker
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051 # v5.10.0
         with:
           images: ghcr.io/${{ github.repository }}/moodle
           tags: |
@@ -85,11 +87,11 @@ jobs:
             type=ref,event=pr
             type=semver,pattern={{version}}
             type=semver,pattern={{major}}.{{minor}}
-            type=sha,prefix={{branch}}-
+            type=sha
             type=raw,value=latest,enable={{is_default_branch}}
 
       - name: Build Moodle image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
         with:
           context: ./docker/moodle
           file: ./docker/moodle/Dockerfile
@@ -100,7 +102,7 @@ jobs:
           cache-to: type=gha,mode=max
 
       - name: Build test image for validation
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
         with:
           context: ./docker/moodle
           file: ./docker/moodle/Dockerfile
@@ -156,10 +158,12 @@ jobs:
     name: Test Stack Startup
     runs-on: ubuntu-latest
     needs: build-moodle-image
+    permissions:
+      contents: read
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Clone Moodle
         run: |
@@ -254,16 +258,18 @@ jobs:
     name: Security Scan
     runs-on: ubuntu-latest
     needs: build-moodle-image
+    permissions:
+      contents: read
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Build Moodle image
         run: docker build -t moodle:scan ./docker/moodle
 
       - name: Run Trivy vulnerability scanner
-        uses: aquasecurity/trivy-action@master
+        uses: aquasecurity/trivy-action@6e7b7d1fd3e4fef0c5fa8cce1229c54b2c9bd0d8 # master
         with:
           image-ref: 'moodle:scan'
           format: 'table'
@@ -273,12 +279,14 @@ jobs:
   markdown-lint:
     name: Markdown Lint
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Lint Markdown files
-        uses: DavidAnson/markdownlint-cli2-action@v14
+        uses: DavidAnson/markdownlint-cli2-action@07035fd053f7be764496c0f8d8f9f41f98305101 # v22.0.0
         with:
           globs: '*.md'
diff --git a/QUICKSTART.md b/QUICKSTART.md
index 65be72e..13295d6 100644
--- a/QUICKSTART.md
+++ b/QUICKSTART.md
@@ -243,7 +243,7 @@ docker compose exec database mysqldump -u root -p moodle | gzip > backup-$(date
 ## What's Running?
 
 | Service | Purpose | Port | Access |
-|---------|---------|------|--------|
+| ------- | ------- | ---- | ------ |
 | Moodle | Web application | 8080 | http://localhost:8080 |
 | MariaDB | Database | - | Internal only |
 | Valkey | Cache + Sessions | - | Internal only |
diff --git a/README.md b/README.md
index 47bacfd..ce8da6d 100644
--- a/README.md
+++ b/README.md
@@ -295,7 +295,7 @@ docker compose exec moodle php admin/cli/purge_caches.php
 docker compose exec moodle php admin/cli/maintenance.php --disable
 ```
 
-## Traefik Integration
+## Manual Traefik Configuration
 
 To enable Traefik reverse proxy with automatic SSL: