Remove a Docker run step and add Docker test note

README.md

@@ -74,7 +74,6 @@ optional arguments:
 
 1. `git clone https://github.com/obsidianforensics/unfurl`
 1. `cd unfurl`
-1. Modify `unfurl.ini` with desired host and port, and `docker-compose.yaml` to match port defined in `unfurl.ini`.
 1. `docker-compose up -d`
 
 ## Testing 
@@ -83,5 +82,8 @@ optional arguments:
 1. While not required, it is strongly encouraged to add tests that cover any new features in a PR. 
 1. To manually run all tests (units and integration): ``python -m unittest discover -s unfurl/tests``
 
+If using Docker as above, run: 
+``docker exec unfurl python -m unittest discover -s unfurl/tests``
+
 ## Legal Bit
 This is not an officially supported Google product.