The build instruction needed updating, and I added a reference to the documentation with the commands for running the container.
@@ -71,9 +71,12 @@ guix package -f guix-env.scm:notest
### 2. Docker
```
-docker build -t gnunet .
+# From within the top-level of this repository run:
+docker build -t gnunet -f ./contrib/docker/Dockerfile .
+For more info on using the docker container see [here](contrib/docker/README.md).
+
Using GNUnet