Update README

README.md

@@ -32,10 +32,51 @@ version: 1
 linter: ghcr.io/expandigroup/qodana-jvm:latest
 ```
 
-# Usage in monorepos
-
 In a monorepo, place the `qodana.yml` file in the project directory, and specify the hacked linter in the GitHub Actions
 workflow.
 
 You can specify `-e SUBPROJECT_DIR=path/to/project` to specify a project to be scanned. It will be scanned while keeping
-still mounting the entire repository.
+still mounting the entire repository.
+
+For instance:
+
+```bash
+qodana scan \
+    -l ghcr.io/expandigroup/qodana-jvm:2024.1 \
+    -i . \
+    -e SUBPROJECT_DIR=backend \
+    -e QODANA_TOKEN="$QODANA_TOKEN"
+```
+
+Sample GitHub Actions workflow:
+
+```yml
+name: Qodana
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches:
+      - main
+      - 'releases/*'
+
+jobs:
+  qodana:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+      checks: write
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}  # to check out the actual pull request commit, not the merge commit
+          fetch-depth: 0  # a full history is required for pull request analysis
+      - name: 'Qodana Scan'
+        uses: JetBrains/[email protected]
+        env:
+          QODANA_TOKEN: ${{ secrets.QODANA_TOKEN }}
+        with:
+            args: -l,ghcr.io/expandigroup/qodana-jvm:2024.1,-e,SUBPROJECT_DIR=backend
+```
+