Simplify README setup: replace scanner configs with links to GitHub docs

Co-authored-by: Ona <no-reply@ona.com>

Author: meysholdt

README.md

@@ -56,139 +56,16 @@ Both automations authenticate using the token from the git credential helper (`G
 
 ## Set up on your own repo
 
-### 1. Enable Dependabot alerts
+### 1. Enable security scanning
 
-Go to **Settings > Code security** and enable:
-- **Dependency graph** (on by default for public repos)
-- **Dependabot alerts**
+Set up scanners so that alerts appear under **Security** in your GitHub repo. This repo uses Dependabot, CodeQL, Trivy, and OSV-Scanner — see the [`.github/workflows/`](.github/workflows/) directory for examples. Use whichever combination fits your project.
 
-### 2. Add the Maven dependency submission workflow
+GitHub docs:
+- [Dependabot alerts](https://docs.github.com/en/code-security/dependabot/dependabot-alerts/configuring-dependabot-alerts)
+- [Code scanning (CodeQL)](https://docs.github.com/en/code-security/code-scanning/enabling-code-scanning/configuring-default-setup-for-code-scanning)
+- [Third-party SARIF uploads](https://docs.github.com/en/code-security/code-scanning/integrating-with-code-scanning/uploading-a-sarif-file-to-github) (Trivy, OSV-Scanner, etc.)
 
-For Maven projects using a parent BOM (e.g., Spring Boot), create `.github/workflows/dependency-submission.yml`:
-
-```yaml
-name: Maven Dependency Submission
-
-on:
-  push:
-    branches: [ "main" ]
-    paths:
-      - 'pom.xml'
-      - '.mvn/**'
-  workflow_dispatch:
-
-permissions:
-  contents: write
-
-jobs:
-  submit:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Set up JDK 17
-        uses: actions/setup-java@v4
-        with:
-          java-version: '17'
-          distribution: 'adopt'
-
-      - name: Submit dependency graph
-        uses: advanced-security/maven-dependency-submission-action@v4
-```
-
-This resolves the full dependency tree with actual versions so Dependabot can match against known CVEs.
-
-### 3. Add Trivy filesystem scanning
-
-Create `.github/workflows/trivy.yml`:
-
-```yaml
-name: trivy
-
-on:
-  push:
-    branches: [ "main" ]
-  pull_request:
-    branches: [ "main" ]
-  schedule:
-    - cron: '29 6 * * 2'
-
-permissions:
-  contents: read
-
-jobs:
-  fs-scan:
-    permissions:
-      contents: read
-      security-events: write
-      actions: read
-    name: Filesystem Scan
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Run Trivy filesystem scanner
-        uses: aquasecurity/trivy-action@0.35.0
-        with:
-          scan-type: 'fs'
-          scan-ref: '.'
-          format: 'sarif'
-          output: 'trivy-fs-results.sarif'
-          severity: 'CRITICAL,HIGH'
-
-      - name: Upload results to GitHub Security tab
-        uses: github/codeql-action/upload-sarif@v3
-        if: always()
-        with:
-          sarif_file: 'trivy-fs-results.sarif'
-          category: 'trivy-fs'
-```
-
-### 4. Add OSV-Scanner
-
-Create `.github/workflows/osv-scanner.yml`:
-
-```yaml
-name: OSV-Scanner
-
-on:
-  pull_request:
-    branches: [ "main" ]
-  merge_group:
-    branches: [ "main" ]
-  schedule:
-    - cron: '39 0 * * 4'
-  push:
-    branches: [ "main" ]
-
-permissions:
-  security-events: write
-  contents: read
-  actions: read
-
-jobs:
-  scan-scheduled:
-    if: ${{ github.event_name == 'push' || github.event_name == 'schedule' }}
-    uses: "google/osv-scanner-action/.github/workflows/osv-scanner-reusable.yml@v2.0.0"
-    with:
-      fail-on-vuln: false
-      scan-args: |-
-        -r
-        ./
-  scan-pr:
-    if: ${{ github.event_name == 'pull_request' || github.event_name == 'merge_group' }}
-    uses: "google/osv-scanner-action/.github/workflows/osv-scanner-reusable-pr.yml@v2.0.0"
-    with:
-      scan-args: |-
-        -r
-        ./
-```
-
-### 5. Enable CodeQL (optional)
-
-Go to **Settings > Code security > Code scanning** and click **Set up** for CodeQL. GitHub's default setup works for most repos. See [GitHub's CodeQL docs](https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages) for advanced configuration.
-
-### 6. Add Ona automations
+### 2. Add Ona automations
 
 Copy the two automation files into your repo: