Update CONTRIBUTING

CONTRIBUTING.md

@@ -6,13 +6,14 @@ Start by opening an issue using one of the issue templates, or propose a change
 
 ## Running the project
 
-1. Install [nvm](https://github.com/nvm-sh/nvm) installed
-2. Install protobuf tools: `brew install protobuf`
+1. Install [nvm](https://github.com/nvm-sh/nvm)
+2. Install protobuf compiler: `brew install protobuf`
 3. Install [Java version >= 8](https://adoptopenjdk.net/)
 4. Change directory to the root of the project
-5. Select Node version with `nvm use`
+5. Select Node version: `nvm use`
 6. Install Node packages: `npm install`
-7. Build Java executables: `npm run compile:java`
+7. Build Java lib: `npm run compile:java`
+8. Build proto lib: `npm run compile:proto`
 
 Now open the root of the project in VS Code, click on the Debug panel, and select either "Run Extension" or any of the test launch configurations.