introduce docker compose

Author: James Lee

Dockerfile

@@ -3,5 +3,4 @@ RUN pip install Flask==0.11.1 redis==2.10.5
 RUN useradd -ms /bin/bash admin
 USER admin
 WORKDIR /app
-COPY app /app
 CMD ["python", "app.py"] 

docker-compose.yml

@@ -0,0 +1,11 @@
+version: '2'
+services:
+  dockerapp:
+    build: .
+    ports:
+      - "5000:5000"
+    volumes:
+      - ./app:/app
+
+  redis:
+    image: redis:3.2.0