update docker-compose.yml to support the comunnication between docker containers (#11)

Author: dengzikun

docker-compose.yml

@@ -5,5 +5,29 @@ services:
       build:
         context: .
         dockerfile: ./docker/Dockerfile
+      environment:
+        - DATABASE_URL=postgres://postgres:postgres@postgres:5432/postgres
+        - ES_HOST=http://elasticsearch:9200
       ports:
         - '3000:3000'
+      depends_on:
+        - postgres
+        - elasticsearch
+      restart: always
+
+
+  postgres:
+    image: postgres
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+    ports:
+      - 5432:5432
+
+  elasticsearch:
+    image: docker.elastic.co/elasticsearch/elasticsearch:7.9.2
+    environment:
+    - discovery.type=single-node
+    ports:
+    - 9200:9200
+