added nginx to traefik migration changes and docs

docker-compose/ELK/logstash/pipeline/logstash.conf

@@ -0,0 +1,24 @@
+input {
+  beats {
+    port => 5044
+  }
+}
+
+filter {
+  # Add your grok/mutate/etc filters here as you get to that lesson.
+}
+
+output {
+  elasticsearch {
+    hosts => ["http://elasticsearch:9200"]
+    user  => "elastic"
+    password => "${ELASTICSEARCH_PASSWORD}"
+    index => "logstash-%{+YYYY.MM.dd}"
+  }
+
+  # Comment this out once you trust the pipeline — it's just here so you
+  # can see events flowing while you're learning.
+  stdout {
+    codec => rubydebug
+  }
+}