Static Web Apps Tutorial: Error from Git:Push operation - Installing nodejs

I'm walking through the tutorial "Add an API to Azure Static Web Apps with Azure Functions":

https://learn.microsoft.com/en-us/azure/static-web-apps/add-api?tabs=vanilla-javascript

I'm able to run the app locally but am getting an error at "Deploy Changes" (near the end), Step 5 pushing changes to Git.

The log from GitHub includes the following:

Detecting platforms... Detected following platforms: nodejs: 18.20.4 Version '18.20.4' of platform 'nodejs' is not installed. Generating script to install it... Error: Could not find either 'build' or 'build:azure' node under 'scripts' in package.json. Could not find value for custom run build command using the environment variable key 'RUN_BUILD_COMMAND'.Could not find tools for building monorepos, no 'lerna.json' or 'lage.config.js' files found.

My YAML file is updated per the tutorial to include the following:

          app_location: "/" # App source code path
          api_location: "api" # Api source code path - optional
          output_location: "build" # Built app content directory - optional 

This is package.json in its entirety:

{
  "name": "vanilla-basic",
  "version": "1.0.0",
  "scripts": { 
    "start": "sirv ./src public --cors --single --no-clear --port 8000"
  }
}

Please advise. Thanks!