docs: readme includes info about clean install xdd

To run the project, execute the following command:

```shell

mvn clean install -DskipTests && \

docker-compose up -d

```

To observe the metrics of the system after the docker containers are up, please visit [Grafana UI](localhost:3000) with default credentials _admin:admin_.

![Main dashboard](image.png)

- note that you might need to clear the old images (if any present)

To observe the metrics of the system after the docker containers are up, please visit [Grafana UI](<localhost:3000>) with default credentials _admin:admin_.

![Main dashboard](image.png)