use docker-compose v2 syntax

Author: julianduque

docker-compose.yml

@@ -1,27 +1,29 @@
-web:
-  image: nginx
-  links:
-    - upload
-    - preview
-    - save
-  ports:
-    - "8000:80"
-  volumes:
-    - ./microservices.conf:/etc/nginx/conf.d/microservices.conf
-  command: [nginx, '-g', 'daemon off;']
+version: "2"
+services:
+  web:
+    image: nginx
+    links:
+      - upload
+      - preview
+      - save
+    ports:
+      - "8000:80"
+    volumes:
+      - ./microservices.conf:/etc/nginx/conf.d/microservices.conf
+    command: [nginx, '-g', 'daemon off;']
 
-upload:
-  build: ./upload
-  environment:
-    - AWS_ACCESS_KEY=${AWS_ACCESS_KEY}
-    - AWS_SECRET_KEY=${AWS_SECRET_KEY}
-preview:
-  build: ./preview
-  environment:
-    - AWS_ACCESS_KEY=${AWS_ACCESS_KEY}
-    - AWS_SECRET_KEY=${AWS_SECRET_KEY}
-save:
-  build: ./save
-  environment:
-    - AWS_ACCESS_KEY=${AWS_ACCESS_KEY}
-    - AWS_SECRET_KEY=${AWS_SECRET_KEY}
+  upload:
+    build: ./upload
+    environment:
+      - AWS_ACCESS_KEY=${AWS_ACCESS_KEY}
+      - AWS_SECRET_KEY=${AWS_SECRET_KEY}
+  preview:
+    build: ./preview
+    environment:
+      - AWS_ACCESS_KEY=${AWS_ACCESS_KEY}
+      - AWS_SECRET_KEY=${AWS_SECRET_KEY}
+  save:
+    build: ./save
+    environment:
+      - AWS_ACCESS_KEY=${AWS_ACCESS_KEY}
+      - AWS_SECRET_KEY=${AWS_SECRET_KEY}