update readme

Author: raxtemur

README.md

@@ -97,16 +97,7 @@ test="true" docker-compose up --build
 ```
 
 If you need to change some application settings, you may update `config.py` according to your needs and re-build the image.
-For example, you can run dedoc on CUDA by setting `on_gpu` to `True` in `config.py`. 
 
-To run Dedoc on CUDA with Docker use files from `docker_gpu` directory 
-([CUDA Container Toolkit](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/latest/install-guide.html) 
-should be installed on your machine):
-
-```shell
-cd docker_gpu
-docker-compose up --build
-```
 
 ## Install dedoc using pip
 

docker_gpu/README.md

@@ -0,0 +1,17 @@
+To run Dedoc on CUDA with Docker use files from `docker_gpu` directory 
+([CUDA Container Toolkit](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/latest/install-guide.html) 
+should be installed on your machine):
+
+1. Set `on_gpu` to `True` in `config.py`
+2. Run application:
+```shell
+cd docker_gpu
+docker-compose up --build
+```
+
+You can change index if CUDA device at `docker-compose.yml`:
+```
+NVIDIA_VISIBLE_DEVICES: 0
+NVIDIA_VISIBLE_DEVICES: 0, 3
+NVIDIA_VISIBLE_DEVICES: all
+```