fix: add missing doc

README.md

@@ -1,3 +1,29 @@
-# Setup Corda 5 CLI Action 
+# Corda 5 CLI Action 
+
+Adds Corda 5 CLI to your [GitHub actions](https://github.com/features/actions). 
+Works well with [corda5-testutils](https://github.com/manosbatsis/corda5-testutils). 
+
+Example workflow fragment:
+
+```yaml
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up JDK
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'zulu'
+          java-version: '11'
+      - name: Setup Corda CLI
+        uses: manosbatsis/setup-corda5-cli-action@test17
+      - name: Build with Gradle
+        uses: gradle/gradle-build-action@v2
+        with:
+          arguments: build test
+```
 
-WiP