Adding instructions to run contract test with a standard Kafka Docker…

… image as an alternate

README.md

@@ -28,13 +28,17 @@ Upon receiving a message, the consumer processes it and publishes a new message
     ```shell
     docker run -p 9092:9092 -p 2181:2181 -p 29092:29092 -v "$PWD/specmatic.yaml:/usr/src/app/specmatic.yaml" znsio/specmatic-kafka-trial virtualize
     ```
+   Alternatively if you want to use a standard Kafka Docker image you can run below command.
+   ```shell
+   docker compose up
+   ```
 2. Run the application.
    ```shell
-    ./gradlew bootRun
+   ./gradlew bootRun
    ```
 3. Run the contract tests.
    ```shell
-    docker run --network="host" -v "$PWD/specmatic.yaml:/usr/src/app/specmatic.yaml" -v "$PWD/src/test/resources:/usr/src/app/examples" znsio/specmatic-kafka-trial test --examples=examples
+   docker run --network="host" -v "$PWD/specmatic.yaml:/usr/src/app/specmatic.yaml" -v "$PWD/src/test/resources:/usr/src/app/examples" znsio/specmatic-kafka-trial test --examples=examples
    ```
 
 ## Get information around other CLI args exposed by specmatic-kafka docker image

docker-compose.yaml

@@ -0,0 +1,25 @@
+version: '3.8'
+
+services:
+  zookeeper:
+    image: confluentinc/cp-zookeeper:latest
+    container_name: zookeeper
+    ports:
+      - "2181:2181"
+    environment:
+      ZOOKEEPER_CLIENT_PORT: 2181
+      ZOOKEEPER_TICK_TIME: 2000
+
+  kafka:
+    image: confluentinc/cp-kafka:latest
+    container_name: kafka
+    ports:
+      - "9092:9092"
+    environment:
+      KAFKA_BROKER_ID: 1
+      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
+      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://localhost:9092
+      KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:9092
+      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
+    depends_on:
+      - zookeeper