Updated readme

Author: jmafoster1

README.md

@@ -66,7 +66,7 @@ For more information on how to use the Causal Testing Framework, please refer to
 2. If you do not already have causal test cases, you can convert your causal DAG to causal tests by running the following command.
 
 ```
-python causal_testing/testing/metamorphic_relation.py --dag_path $PATH_TO_DAG --output_path $PATH_TO_TESTS
+python -m causal_testing -G --dag_path $PATH_TO_DAG --output_path $PATH_TO_TESTS
 ```
 
 3. You can now execute your tests by running the following command.
@@ -76,6 +76,32 @@ python -m causal_testing --dag_path $PATH_TO_DAG --data_paths $PATH_TO_DATA --te
 The results will be saved for inspection in a JSON file located at `$OUTPUT`.
 In the future, we hope to add a visualisation tool to assist with this.
 
+## Docker Image
+Rather than installing the package and its dependencies locally, we also provide a docker image.
+To run this, the only pre-requisite is [Docker](https://www.docker.com/).
+To build the image, run
+```
+docker build --tag causal_testing # or some other tag if you prefer
+```
+
+After this, you can simply follow the usage instructions above, replacing `python -m causal_testing` with `docker run causal_testing`.
+You will also need to provide docker access to the input files.
+If you have the following directory structure
+```
+example
+    ├── causal_tests.json
+    ├── dag.dot
+    ├── data.csv
+```
+you would use the following docker command.
+```
+docker run -v full/path/to/example:/example -it causal_testing -D /example/dag.dot -o /example/log.json -d /example/data/random/data_random_1000.csv -t /example/causal_tests.json
+```
+A file called `log.json` would then appear in the `example` directory along with your causal tests, DAG, and data.
+
+>[!NOTE]
+> Docker only deals with absolute paths, so you need to provide the full absolute path to the `example` directory, e.g. `/home/user/Documents/example` in linux, or `C:\Users\user\example` in Windows.
+
 ## How to Cite
 If you use our framework in your work, please cite the following: