Add GPU installation instructions

Installing-with-GPU-support.md

@@ -0,0 +1,29 @@
+### Installing for GPU use  
+Currently using GPUs is supported on Linux only. To quickly get started make sure you have the following dependencies installed:
+- [Docker 19.03 (or newer)](https://docs.docker.com/engine/install/)
+- [NVIDIA Container Toolkit](https://github.com/NVIDIA/nvidia-docker)
+
+### Verifying that the containers can see the GPUs
+Once you have the dependencies installed you should be able to run this command:
+```sh
+docker run --gpus all nytimes/blender:2.82-gpu-ubuntu18.04 nvidia-smi
+```
+
+And it should print something that looks like:
+```sh
++-----------------------------------------------------------------------------+
+| NVIDIA-SMI 430.09       Driver Version: 430.09       CUDA Version: 10.1     |
+|-------------------------------+----------------------+----------------------+
+| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
+| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
+|===============================+======================+======================|
+|   0  GeForce GTX 1650    Off  | 00000000:01:00.0 Off |                  N/A |
+| N/A   47C    P8     6W /  N/A |    764MiB /  3907MiB |     23%      Default |
++-------------------------------+----------------------+----------------------+
+                                                                               
++-----------------------------------------------------------------------------+
+| Processes:                                                       GPU Memory |
+|  GPU       PID   Type   Process name                             Usage      |
+|=============================================================================|
++-----------------------------------------------------------------------------+
+```