Update quick-start commands

Author: VajiraPrabuddhaka

docs/getting-started/quick-start-guide.md

@@ -22,9 +22,8 @@ Run the following command to start the dev container and launch a terminal sessi
 
 ```shell
 docker run --rm -it --name openchoreo-quick-start \
+--pull always \
 -v /var/run/docker.sock:/var/run/docker.sock \
--v openchoreo-state:/state \
--v tf-state:/app/terraform \
 --network bridge \
 -p 8443:8443 \
 -p 7007:7007 \
@@ -38,7 +37,7 @@ This process sets up a [KinD](https://kind.sigs.k8s.io/) (Kubernetes-in-Docker)
 To begin the installation, run:
 
 ```shell
-TF_VAR_openchoreo_version="0.0.0-latest-dev" ./install.sh
+./install.sh --openchoreo-version 0.0.0-latest-dev
 ```
 
 **💡 Tip:** If you previously used this setup and encounter errors during installation, ensure you perform the proper cleanup as outlined in the [Cleaning up](#cleaning-up) section before starting again.