Add docker-compose file for zookeeper, kafka, and postgres

docker-compose.yml

@@ -0,0 +1,21 @@
+version: '2'
+services:
+  zookeeper:
+    image: wurstmeister/zookeeper
+    ports:
+      - "2181:2181"
+  kafka:
+    image: wurstmeister/kafka:0.10.2.0
+    ports:
+      - "9092:9092"
+    environment:
+      KAFKA_ADVERTISED_HOST_NAME: localhost
+      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+  postgres:
+    image: postgres:9.6
+    ports:
+      - "5432:5432"
+    environment:
+      POSTGRES_PASSWORD: SUPERSECRETPASSWORD