Update README for GUI

mock_service/README.md

@@ -53,7 +53,7 @@ The full Python mocking DSL can be found [here](./doc/pydoc/mocking-dsl.md)
 
 # Running mockservice
 
-Firstly, you will need to install all necessary Python dependencies by issuing the following command in your favorite terminal:
+Firstly, you will need to install all necessary Python dependencies by using the following command in your favorite terminal:
 
 ```bash
 python3 -m pip install -r ./requirements.txt
@@ -67,6 +67,31 @@ cd mock
 python3 mockservice.py
 ```
 
+# Running showcase GUI
+
+Firstly, you will need to install all necessary Python dependencies by using the following command in your favorite terminal:
+
+```bash
+# install requirements of mock service
+python3 -m pip install -r ./requirements.txt
+# install additional requirements of the GUI
+python3 -m pip install --pre kuksa-client
+# install mock service from mock_service directory to make it available in the GUI
+python3 -m pip install -e .
+```
+
+To run the GUI do the following in your favourtie terminal:
+
+```bash
+python3 showcase_gui/GUI.py
+```
+
+If you run it from mock directory the mock datapoints defined by mock.py get used as well:
+```bash
+cd mock
+python3 ../showcase_gui/GUI.py
+```
+
 # Generating API documentation
 
 API documentation is generated from Python docs and embedded into markdown files for easy rendering on Github without external hosting. The workflow `ensure-docs-up2date` makes sure that the API docs are up to date before merging a pull request. To update the docs, run