Update README.md

As per Dan C (regarding Sufyaan's issues), added the following commands after `agoric install`:
`cd contract`
`yarn test`

main/guides/dapps/README.md

@@ -24,6 +24,10 @@ If you have installed the [Agoric CLI](../getting-started/) and you want to try
 	cd my-fungible-faucet
 	# Install the project dependencies
 	agoric install
+	# Move to the contract directory
+ 	cd contract
+ 	# Run the yarn test command
+ 	yarn test
 	# Start the Agoric VM
 	agoric start --reset
 	```