upgrade circleci to V2

Author: smalltide

.circleci/config.yml

@@ -0,0 +1,19 @@
+version: 2
+jobs:
+  build:
+    working_directory: /dockerapp
+    docker:
+      - image: docker:17.05.0-ce-git
+    steps:
+      - checkout
+      - setup_remote_docker
+      - run:
+          name: Install dependencies
+          command: |
+            apk add --no-cache py-pip=9.0.0-r1
+            pip install docker-compose==1.15.0
+      - run:
+          name: Run tests
+          command: |
+            docker-compose up -d
+            docker-compose run dockerapp python test.py

README.md

@@ -153,7 +153,7 @@ define container netwokr with docker-compose
   > docker-compose up -d
   > docker network ls (dockerapp0.4 app run on dockerapp04_my_net)
 ```
-![alt text](https://github.com/smalltide/docker-tutorial-devops/blob/master/docker-compose-example.png "docker-compose-example")
+![alt text](https://github.com/smalltide/docker-tutorial-devops/blob/master/img/docker-compose-example.png "docker-compose-example")
 
 Write and Run Unit Tests inside Containers
 ```

circle.yml

@@ -1,11 +1,10 @@
-version: "2"
+version: "3.0"
 services:
   dockerapp:
     build: .
     ports:
       - "5000:5000"
-    volumes:
-      - ./app:/app
-    
+    depends_on:
+      - redis
   redis:
     image: redis:3.2.0