docs: Add Docker docs docker.md

README.md

@@ -26,6 +26,8 @@ is done by linking the configuration in modules-available to the
 
 An official docker image is available at https://hub.docker.com/r/mumblevoip/mumo.
 
+More information in [docker.md](docker.md).
+
 ## Modules for Mumble moderator
 
 ### Included modules

docker.md

@@ -0,0 +1,47 @@
+# Mumo Docker Image
+
+[Docker](https://en.wikipedia.org/wiki/Docker_(software)) is a containerization and virtualization of applications and application environments.
+
+An official docker image is available at https://hub.docker.com/r/mumblevoip/mumo.
+
+## Network access to Mumble
+
+Mumo accesses Mumble via the Ice interface. If you run Mumble Server in a docker container too, a network_mode configuration needs to be added so Mumo can access it.
+
+If you are connecting to a non-containerized/generally-accessible Mumble Server this is not necessary.
+
+The target is configured in `mumo.ini` with `host` and `port`.
+
+## Data Volume - Configuration
+
+`/data` is a Docker volume. You can bind your own folder to it for configuration and enabling and adding additional Mumo modules.
+
+## Changing Enabled/Loaded Modules
+
+When you add/enable new modules you need the restart the container.
+
+## Running the Mumo Docker Image
+
+The Mumo docker image can be run with:
+
+```
+docker run --name mumo --net=container:<id_of_mumble_server_container> -d -v /path/to/mumo/folder:/data mumblevoip/mumo
+```
+
+## Docker Compose
+
+[Docker Compose](https://docs.docker.com/compose/) allows you to configure and run multi-container applications. This is useful to run a Mumble and Mumo container in a connected manner.
+
+A docker-compose(v2.4) example:
+
+```
+    mumble-mumo:
+        image: mumblevoip/mumo
+        container_name: mumble-mumo
+        restart: on-failure
+        volumes:
+            - /path/to/mumo/folder:/data
+        network_mode : "service:mumble-server"
+        depends_on:
+            - mumble-server
+```