User Documentation

- Adding README.md

Change-Id: I1d33531031ad904e1d1b09a8b4268984836759cb
Issue-ID: DCAEGEN2-398
Signed-off-by: pwielebs <piotr.wielebski@nokia.com>

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+# PRH (PNF Registration Handler)
+
+Physical Network Function Registration Handler is responsible for registration of PNF (Physical Network Function) to 
+ONAP (Open Network Automation Platform) in plug and play manner. 
+
+## Introduction 
+
+PRH is delivered as one **Docker container** which hosts application server and can be started by `docker-compose`.
+
+## Functionality
+
+![](docs/prhAlgo.png)
+        
+## Compiling PRH
+
+Whole project (top level of PRH directory) and each module (sub module directory) can be compiled using 
+`mvn clean install` command.   
+
+## Main API Endpoints
+
+Running with dev-mode of PRH
+
+- **Heartbeat**: http://<container_address>:8100/**heartbeat** or https://<container_address>:8443/**heartbeat**
+
+- **Start PRH**: http://<container_address>:8100/**start** or https://<container_address>:8433/**start**
+
+- **Stop PRH**: http://<container_address>:8100/**stopPrh** or https://<container_address>:8433/**stopPrh**    
+
+## Maven GroupId:
+
+org.onap.dcaegen2.services
+
+### Maven Parent ArtifactId:
+
+dcae-services
+
+### Maven Children Artifacts:
+1. prh-app-server: Pnf Registration Handler (PRH) server
+2. prh-aai-client: Contains implementation of AAI client
+3. prh-dmaap-client: Contains implementation of DmaaP client
+4. prh-commons: Common code for whole prh modules
+
+
+## License
+
+Copyright (C) 2018 NOKIA Intellectual Property. All rights reserved.
+[License](http://www.apache.org/licenses/LICENSE-2.0)
+

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