add docker-compose for testing remote renderering

Author: woodsaj

README.md

@@ -10,6 +10,27 @@ Nodejs v8+ installed.
 
 - git clone into Grafana external plugins folder. 
 - yarn install --pure-lockfile
-- npm run build
+- yarn run build
 - restart grafana-server , it should log output that the renderer plugin was found and started. 
 - To get more logging info update grafana.ini section [log] , key filters = rendering:debug
+
+
+# Remote Rendering Docker image
+
+A dockerfile is provided for deploying the remote-image-renderer in a container.
+You can then configure your Grafana server to use the container via the 
+```
+[rendering]
+server_url=http://renderer:8081/render
+```
+config setting in grafana.ini
+
+A docker-compose example is provided in docker/
+to launch
+
+```
+cd docker
+docker-compose up
+```
+
+

docker/docker-compose.yaml

@@ -0,0 +1,17 @@
+version: '2'
+
+services:
+  grafana:
+    hostname: grafana
+    image: grafana:dev
+    ports:
+     - "3000:3000"
+     - "2003:2003"
+    volumes:
+      - ./grafana.ini:/etc/grafana/grafana.ini
+  renderer:
+    hostname: renderer
+    image: grafana-image-renderer:latest
+    ports:
+      - "8081:8081"
+