Add instructions to view example script results from Docker

README.md

@@ -189,8 +189,7 @@ result = vl(my_video_arr, fps=my_video_fps)
 ### Example: Run example script with Docker
 
 If you encounter issues installing `vitallens-python` dependencies directly, you can use our Docker image, which contains all necessary tools and libraries.
-This docker image is set up to execute the example Python script in `examples/test.py` for you.
-Please note that the example script plots won't work when running them through Docker. 
+This docker image is set up to execute the example Python script in `examples/test.py` for you. 
 
 #### Prerequisites
 
@@ -231,6 +230,16 @@ docker run vitallens \
   --method "VITALLENS"
 ```
 
+4. View the results
+
+The results will print to the console in text form.
+
+Please note that the example script plots won't work when running them through Docker. To to get the plot as an image file, run:
+
+```
+docker cp <container_id>:/app/results.png .
+```
+
 ## Linting and tests
 
 Before running tests, please make sure that you have an environment variable `VITALLENS_DEV_API_KEY` set to a valid API Key. 

examples/test.py

@@ -83,6 +83,7 @@ def run(args=None):
   ax1.legend()
   if 'respiratory_waveform' in vital_signs: ax2.legend()
   plt.show()
+  plt.savefig('results.png')
 
 def method_type(name):
   try: