Updated Usage (markdown)

Usage.md

@@ -4,8 +4,16 @@ docker compose --profile [ui] up --build
 ```
 where `[ui]` is one of `hlky`, `auto`, `auto-cpu`, and `lstein`.
 
-In the `docker-compose.yml` you can change the `CLI_ARGS` variable for all of the available UIs.
+(Optional) If you want to customize the behaviour of the uis, you can create a `docker-compose.override.yml` and override the `CLI_ARGS` variable or whatever you want from the [main `docker-compose.yml` file](https://github.com/AbdBarho/stable-diffusion-webui-docker/blob/master/docker-compose.yml). Example:
 
+```yml
+services:
+   automatic1111:
+     environment:
+       - CLI_ARGS=--lowvram
+```
+
+Possible configuration:
 
 ## `auto`
 By default: `--medvram` are given, which allow you to use this model on a 6GB GPU, you can also use `--lowvram` for lower end GPUs.
@@ -14,7 +22,7 @@ By default: `--medvram` are given, which allow you to use this model on a 6GB GP
 This also has support for custom models, put the weights in the folder `cache/custom-models` (create if its not there), you can then change the model from the settings tab. There is also a `services/AUTOMATIC1111/config.json` file which contains additional config for the UI. 
 
 ## `auto-cpu`
-CPU instance of the above, requires `--no-half --precision full` for it to run.
+CPU instance of the above, requires `--no-half --precision full` for it to run, which are already given
 
 
 ## `hlky`