little improvements to help page

pdb-js/src/app/help-page/help-page.component.html

@@ -15,7 +15,7 @@ This page describes how to use this tool.
 <p>
 There are many tools out there that do monitoring in one way or the other. There are complete closed source solutions like 
 <a href="https://newrelic.com" target="_blank" rel="nofollow" class="external-link">New Relic</a>, 
-<a href="https://www.splunk.com" target="_blank" rel="nofollow" class="external-link">Splunk</a>, 
+<a href="https://www.splunk.com" target="_blank" rel="nofollow" class="external-link">Splunk</a> 
 and <a href="https://www.appdynamics.com/" target="_blank" rel="nofollow" class="external-link">App Dynamics</a>.
 They bring everything you need, a tool to collect logs or metrics, a database, a UI with dashboards and alerting.
 </p>
@@ -23,16 +23,27 @@ They bring everything you need, a tool to collect logs or metrics, a database, a
 The OSS community likes to break them down into separate tools. 
 For example the <a href="https://www.elastic.co/products/elastic-stack" target="_blank" rel="nofollow" class="external-link">ELK</a>-stack
 consists of <a href="https://www.elastic.co/products/elasticsearch" target="_blank" rel="nofollow" class="external-link">Elasticsearch</a>
-as database, and <a href="https://www.elastic.co/products/kibana" target="_blank" rel="nofollow" class="external-link">Kibana</a> 
+as database and <a href="https://www.elastic.co/products/kibana" target="_blank" rel="nofollow" class="external-link">Kibana</a> 
 as the UI. It is usually combined with <a href="https://www.elastic.co/products/logstash" target="_blank" rel="nofollow" class="external-link">Logstash</a> 
-for logfile collection.<br/>
+or <a href="https://www.elastic.co/de/beats/filebeat" target="_blank" rel="nofollow" class="external-link">Filebeat</a> 
+for logfile collection.</p>
+<p>
 Another popular UI is <a href="https://grafana.com/" target="_blank" rel="nofollow" class="external-link">Grafana</a> 
 which can be combined with
 <a href="https://grafana.com/oss/loki/" target="_blank" rel="nofollow" class="external-link">Loki</a>,
 <a href="https://prometheus.io/" target="_blank" rel="nofollow" class="external-link">Prometheus</a>,
 <a href="https://graphiteapp.org/" target="_blank" rel="nofollow" class="external-link">Graphite</a> or
 <a href="https://grafana.com/oss/metrictank/" target="_blank" rel="nofollow" class="external-link">Metrictank</a> (which is an engine for Graphite).
-
+</p>
+<p>
+Newer and popular for its good database is the duo <a href="https://www.influxdata.com/products/influxdb-overview/" target="_blank" rel="nofollow" class="external-link">InfluxDB</a> 
++ <a href="https://www.influxdata.com/time-series-platform/chronograf/" target="_blank" rel="nofollow" class="external-link">Chronograf</a>. 
+</p>
+<p>
+Apart from the general purpose solutions there are also more specialized tools. For example 
+<a href="https://www.nagios.org/" target="_blank" rel="nofollow" class="external-link">Nagios</a>/<a href="https://icinga.com/" target="_blank" rel="nofollow" class="external-link">Icinga</a>
+which specializes in hardware monitoring.
+</p>
 <br/>
 <br/><br/>
 <a href="https://www.elastic.co/products/kibana" target="_blank" rel="nofollow" class="external-link">Kibana</a> (<a href="https://www.elastic.co/products/elastic-stack" target="_blank" rel="nofollow" class="external-link">ELK</a>), 
@@ -43,7 +54,7 @@ which can be combined with
 <a href="https://grafana.com/oss/loki/" target="_blank" rel="nofollow" class="external-link">Loki</a>,
 <a href="https://grafana.com/" target="_blank" rel="nofollow" class="external-link">Grafana</a>,
 
- 
+<a href="https://www.solarwinds.com/" target="_blank" rel="nofollow" class="external-link">Solarwinds</a>
 <a href="https://github.com/Netflix/atlas" target="_blank" rel="nofollow" class="external-link">Netflix Atlas</a>, 
 <a href="https://oss.oetiker.ch/rrdtool/" target="_blank" rel="nofollow" class="external-link">RRDtool</a>, 
 <a href="http://ganglia.sourceforge.net/" target="_blank" rel="nofollow" class="external-link">Ganglia</a>,