Making deployment instructions in vars.sample more clear on new resources which will be created

[sushaanttb]

In the deployment steps, when trying to configure the vars.env as per the provided instructions, it looks like that Synapse instance should already be created beforehand. Please refer attached screenshot.

In a way this gives an impression to the user that this toolkit will deploy some visualization solution based on existing resources and the user will thus first try to create those resources manually and then will come back here to fill those details, which is not the case as the deploy.sh is taking care of creating all those resources.

Hence, it would be immensely helpful if we can clarify the same in our instructions i.e. resources which should be pre-existing & resources which deploy.sh will create.