docs: Multiple disk support

readme.md

@@ -80,6 +80,30 @@ docker run -it --rm -e "BOOT=http://www.example.com/image.iso" --device=/dev/kvm
 
     Replace the example path `/home/user/data` with the desired storage folder.
 
+  * ### How do I add multiple disks?
+
+    To add multiple disks, modify your compose file like this:
+
+    ```yaml
+    environment:
+      DISK2_SIZE: "32G"
+      DISK3_SIZE: "64G"
+    volumes:
+      - /home/example2:/storage2
+      - /home/example3:/storage3
+    ```
+
+    Additionally, it's also possible to passthrough raw disk devices like this:
+
+    ```yaml
+    environment:
+      DEVICE2: "/dev/vdc1"
+      DEVICE3: "/dev/vdc2"
+    devices:
+      - /dev/vdc1
+      - /dev/vdc2
+    ```    
+
   * ### How do I increase the amount of CPU or RAM?
 
     By default, a single core and 512 MB of RAM are allocated to the container. To increase this, add the following environment variables: