Update README.md

Author: samueljon

README.md

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+# docker-adagios-rpm
+Docker image for Adagios built from rpms (Naemon-Adagios)
+
+[![Docker Stars](https://img.shields.io/docker/stars/opinkerfi/adagios-rpm.svg)]()
+[![Docker Pulls](https://img.shields.io/docker/pulls/opinkerfi/adagios-rpm.svg)]()
+[![GitHub tag](https://img.shields.io/github/tag/opinkerfi/adagios-rpm.svg)]()
+[![GitHub release](https://img.shields.io/github/release/opinkerfi/adagios-rpm.svg)]()
+
+## Usage
+
+```
+docker create \ 
+  --name=my-adagios \
+  -p 80:80 \
+  opinkerfi/adagios-git
+```
+
+## Parameters
+
+The parameters are split into two halves, separated by a colon, the left hand side representing the host and the right the container side. 
+For example with a port -p external:internal - what this shows is the port mapping from internal to external of the container.
+So -p 8080:80 would expose port 80 from inside the container to be accessible from the host's IP on port 8080
+http://192.168.x.x:8080 would show you what's running INSIDE the container on port 80.
+
+* `-p 80` - Port for adagios webui
+
+For shell access whilst the container is running do `docker exec -it my-adagios /bin/bash`.