Add cutsom volmues section in Installing.md

INSTALLING.md

@@ -6,7 +6,8 @@
    [`.env`](https://raw.githubusercontent.com/zoriya/Kyoo/master/.env.example) files
 3. Fill the `.env` file with your configuration options
 4. Look at [Hardware Acceleration section](#Hardware-Acceleration) if you need it
-5. Run `docker compose up -d` and see kyoo at `http://localhost:8901`
+5. Look at [Custom Volumes](#Custom-Volumes) if you need it,
+6. Run `docker compose up -d` and see kyoo at `http://localhost:8901`
 
 # Installing
 
@@ -28,7 +29,8 @@ Those files are:
 > The `docker-compose.yml` file describes the different services of Kyoo, where they should be downloaded and their start order. \
 > The `.env` file contains all the configuration options that the services in `docker-compose.yml` will read.
 
-If you need hardware acceleration, look at [Hardware Acceleration section](#Hardware-Acceleration) if you need it
+If you need hardware acceleration, look at [Hardware Acceleration section](#Hardware-Acceleration).
+If you need custom volumes (because video directories are on different disks and you can't use raid, because you use network drives or another custom volume type), look at [Custom Volumes](#Custom-Volumes).
 
 The next and last step is actually starting Kyoo. To do that, open a terminal in the same directory as the 3 configurations files
 and run `docker-compose up -d`.
@@ -88,3 +90,32 @@ You can also add `COMPOSE_PROFILES=nvidia` to your `.env` instead of adding the
 
 Note that most nvidia cards have an artificial limit on the number of encodes. You can confirm your card limit [here](https://developer.nvidia.com/video-encode-and-decode-gpu-support-matrix-new).
 This limit can also be removed by applying an [unofficial patch](https://github.com/keylase/nvidia-patch) to you driver.
+
+# Custom volumes
+
+To customize volumes, you can edit the `docker-compose.yml` manually.
+
+For example, if your library is split into multiples paths you can edit the `volumes` section of **BOTH the transcoder and the scanner** like so:
+
+```patch
+ x-transcoder: &transcoder-base
+   image: ghcr.io/zoriya/kyoo_transcoder:edge
+   networks:
+     default:
+       aliases:
+         - transcoder
+   restart: unless-stopped
+   env_file:
+     - ./.env
+   environment:
+     - GOCODER_PREFIX=/video
+   volumes:
+-    - ${LIBRARY_ROOT}:/video:ro
++    - /my_path/number1:/video/1:ro
++    - /c/Users/Videos/:video/c:ro
+     - ${CACHE_ROOT}:/cache
+     - metadata:/metadata
+```
+You can also edit the volume definition to use advanced volume drivers if you need to access smb or network drives. Mounting a drive into your filesystem and binding it in this volume section is also a valid choice (especially for fuse filesystems like cloud drives for example).
+
+Don't forget to **also edit the scanner's volumes** if you edit the transcoder's volume.