README setup instructions improved

Author: Bengt Lofgren

README.md

@@ -12,10 +12,22 @@ git clone [email protected]:wormhole-foundation/example-liquidity-layer.git --recur
 
 ## Prerequisites
 
+### Node version
+
+It is recommended to use `Node v20.18.x`.
+
+```bash
+# E.g.
+nvm install 20.18.2
+nvm use 20.18.2
+```
+
 ### EVM
 
 Install [Foundry tools](https://book.getfoundry.sh/getting-started/installation), which include `forge`, `anvil` and `cast` CLI tools.
 
+Before using the typescript SDK, build the evm types by running `npm run build` *inside* the `evm` directory. Without this step, the typescript SDK will not be able to be interpreted by the typescript compiler.
+
 ## Build, Test and Deploy Smart Contracts
 
 Each directory represents Wormhole integrations for specific blockchain networks. Please navigate to a network subdirectory to see more details (see the relevant README.md) on building, testing and deploying the smart contracts.