add OMV beginners

Author: theking2

docs/getting-started/beginners-guide-omv-docker.md

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+---
+layout: default
+title: Beginner's Docker Guide on Open Media Vault
+---
+
+# Beginner's Docker Guide on Open Media Vault
+
+!!! note
+    In case you have any difficulties following this guide or have found some errors, please leave a note on the [forums](https://forums.lyrion.org/forum/developer-forums/developers/1668265-documentation-update-call-for-volunteers). Thanks!
+
+If you have a Open Media Vault NAS which can run Docker containers aka. "Compose", you are in luck!
+
+This guide uses our ["official" Docker image](https://hub.docker.com/r/lmscommunity/lyrionmusicserver/). Source and the dockerfile of the image can be found [here](https://github.com/LMS-Community/slimserver-platforms/tree/HEAD/Docker).
+
+## Assumptions
+
+In this guide the following assumptions apply:
+
+- Your music is stored in a folder in a storage pool, `/pool0/media`
+- Configuration will be stored in `/pool0/lyrion_config`
+- You run your LMS in "host" mode meaning that the 9000 port needs to be free on you NAS
+
+## Add an LMS application to Compose Files
+
+1. Open "Service / Composer / Files"
+2. Click "+" to create a new container
+3. Set an "Name", i.e. "lms". It must be between 1 and 32 characters.
+4. Paste the Docker Compose configuration, adapting it to your needs :
+    ``` yaml
+    services:
+        lms:
+            container_name: lms
+            image: lmscommunity/lyrionmusicserver
+            volumes:
+                - /pool0/lyrion_config:/config:rw
+                - /pool0/media:/music:ro
+                - /pool0/media:/playlist:rw
+                - /etc/localtime:/etc/localtime:ro
+                - /etc/timezone:/etc/timezone:ro
+            network_mode: host
+            environment:
+                - HTTP_PORT=9000
+            restart: always
+    ```
+5. Click "Save" to save the container
+6. Once created you should see your application in the list
+7. Select the file from the list and 
+8. Click the up button
+
+
+## Open LMS
+
+1. Launch your web browser and type: `http://[ip address you noted previously]:9000`. Then, press Enter. The Lyrion Music Server web interface will open.
+2. Configure LMS as desired
+
+## Updating the Docker image
+
+It is always advisable to regularly update your software, and with Docker on Synology it is made very easy.
+
+1. Open "Compose / Files" and select the "LMS" file
+2. Click the pull button