Add PowerShell example, link to Docker Metrics script

Author: StefanScherer

prometheus/README.md

@@ -1,7 +1,26 @@
 # prometheus
 [![This image on DockerHub](https://img.shields.io/docker/pulls/stefanscherer/prometheus-windows.svg)](https://hub.docker.com/r/stefanscherer/prometheus-windows/)
 
+# PowerShell
+
+The command line options with a dot need to be quoted in PowerShell:
+
+```powershell
+mkdir C:\prom
+copy prometheus.yml C:\prom\prometheus.yml
+docker container run -d -p 9090:9090 `
+  -v "C:\prom\data:C:\prometheus" -v "C:\prom:C:\config" `
+  stefanscherer/prometheus-windows '-config.file=/config/prom.yml' `
+  '-storage.local.path=/prometheus' `
+  '-web.console.libraries=/etc/prometheus/console_libraries' `
+  '-web.console.templates=/etc/prometheus/consoles'
 ```
+
+# bash
+
+From my Mac:
+
+```bash
 $ mkdir -p data
 $ docker run -d -p 9090:9090 \
   -v C:$(pwd)/data:C:/prometheus -v C:$(pwd):C:/config \
@@ -13,3 +32,5 @@ $ open http://$(docker-machine ip windows):9090
 ```
 
 See the [Getting started](https://prometheus.io/docs/introduction/getting_started/) guide to learn more about Prometheus.
+
+See the script [start-prometheus.ps1](https://github.com/StefanScherer/docker-windows-box/blob/master/scripts/prometheus/start-prometheus.ps1) and [prom.yml](https://github.com/StefanScherer/docker-windows-box/blob/master/scripts/prometheus/prom.yml) to activate the Docker Metrics API and run Prometheus collecting it.