Initialize ELK stack availability

Fix link

Author: Vincent Composieux

README.md

@@ -48,9 +48,11 @@ This results in the following running containers:
         docker_php_1           php5-fpm -F             Up      9000/tcp
 ```
 
-# Read logs
+# Read logs / Kibana
 
 You can access Nginx and Symfony application logs in the following directories into your host machine:
 
 * `logs/nginx`
 * `logs/symfony`
+
+You can also uncomment the `elk` container section in `docker-compose.yml` in order to enable the [willdurand/elk](https://www.github.com/willdurand/docker-elk) image.

docker-compose.yml

@@ -31,3 +31,13 @@ nginx:
         - application
     volumes:
         - logs/nginx/:/var/log/nginx
+#elk:
+#    image: willdurand/elk
+#    ports:
+#        - "81:80"
+#    volumes:
+#        - elk/logstash:/etc/logstash
+#        - elk/logstash/patterns:/opt/logstash/patterns
+#    volumes_from:
+#        - php
+#        - nginx