Added Flask/Redis

Signed-off-by: ajeetraina <ajeetraina@gmail.com>

flask-redis/README.md

@@ -0,0 +1,56 @@
+## Compose sample application
+### Python/Flask application
+
+Project structure:
+```
+.
+├── docker-compose.yaml
+├── app
+    ├── Dockerfile
+    ├── requirements.txt
+    └── app.py
+
+```
+
+[_docker-compose.yaml_](docker-compose.yaml)
+```
+services: 
+  web: 
+    build: app 
+    ports: 
+      - '5000:5000'
+```
+
+## Deploy with docker-compose
+
+```
+$ docker-compose up -d
+Creating network "flask_default" with the default driver
+Building web
+Step 1/6 : FROM python:3.7-alpine
+...
+...
+Status: Downloaded newer image for python:3.7-alpine
+Creating flask_web_1 ... done
+
+```
+
+## Expected result
+
+Listing containers must show one container running and the port mapping as below:
+```
+$ docker ps
+CONTAINER ID        IMAGE                        COMMAND                  CREATED             STATUS              PORTS                  NAMES
+c126411df522        flask_web                    "python3 app.py"         About a minute ago  Up About a minute   0.0.0.0:5000->5000/tcp flask_web_1
+```
+
+After the application starts, navigate to `http://localhost:5000` in your web browser or run:
+```
+$ curl localhost:5000
+Hello World!
+```
+
+Stop and remove the containers
+```
+$ docker-compose down
+```