fix: Add readme information.

issue: #56

docker-orchestration/elk-compose/docker-elk/README.md

@@ -1 +1,40 @@
-# ELK
+# ELK Stack
+
+Specify your log location in docker-compose.yml->logstash->volume mapping
+```
+// change "/Users/xunliu/Desktop/git/elastic-example/data/" to your data location
+// later will abstract this to parameters
+/Users/xunliu/Desktop/git/elastic-example/data/:/data
+```
+
+Start
+```
+docker-compose -f docker-compose.yml up
+```
+
+Stop and delete all temp data
+```
+docker-compose -f docker-compose.yml down -v
+```
+
+You could go to following link for Kibana
+```
+http://localhost:5601
+```
+
+If you need one component specific logs, you could use
+```
+docker-compose logs | grep logstash
+```
+
+If you need debug specific service, for example, debug logstash
+```
+// find your logstash's container id
+docker container ls
+
+// enter container
+docker exec -it a03643622486 /bin/bash
+
+// go to logstash folder
+./bin/logstash --config.test_and_exit -f /usr/share/logstash/config/log
+```