No build script in the default package.json

[foolip]

After following https://learn.microsoft.com/en-us/azure/static-web-apps/getting-started?tabs=vanilla-javascript my first deploy failed with logs like this:

/usr/bin/docker run --name c0442fd7fd7dbfb744c4f92002043a0736abb_229844 --label 6c0442 --workdir /github/workspace --rm -e "INPUT_AZURE_STATIC_WEB_APPS_API_TOKEN" -e "INPUT_REPO_TOKEN" -e "INPUT_ACTION" -e "INPUT_APP_LOCATION" -e "INPUT_API_LOCATION" -e "INPUT_OUTPUT_LOCATION" -e "INPUT_API_BUILD_COMMAND" -e "INPUT_APP_ARTIFACT_LOCATION" -e "INPUT_APP_BUILD_COMMAND" -e "INPUT_ROUTES_LOCATION" -e "INPUT_SKIP_APP_BUILD" -e "INPUT_CONFIG_FILE_LOCATION" -e "INPUT_SKIP_API_BUILD" -e "INPUT_PRODUCTION_BRANCH" -e "INPUT_DEPLOYMENT_ENVIRONMENT" -e "INPUT_IS_STATIC_EXPORT" -e "INPUT_DATA_API_LOCATION" -e "HOME" -e "GITHUB_JOB" -e "GITHUB_REF" -e "GITHUB_SHA" -e "GITHUB_REPOSITORY" -e "GITHUB_REPOSITORY_OWNER" -e "GITHUB_REPOSITORY_OWNER_ID" -e "GITHUB_RUN_ID" -e "GITHUB_RUN_NUMBER" -e "GITHUB_RETENTION_DAYS" -e "GITHUB_RUN_ATTEMPT" -e "GITHUB_REPOSITORY_ID" -e "GITHUB_ACTOR_ID" -e "GITHUB_ACTOR" -e "GITHUB_TRIGGERING_ACTOR" -e "GITHUB_WORKFLOW" -e "GITHUB_HEAD_REF" -e "GITHUB_BASE_REF" -e "GITHUB_EVENT_NAME" -e "GITHUB_SERVER_URL" -e "GITHUB_API_URL" -e "GITHUB_GRAPHQL_URL" -e "GITHUB_REF_NAME" -e "GITHUB_REF_PROTECTED" -e "GITHUB_REF_TYPE" -e "GITHUB_WORKFLOW_REF" -e "GITHUB_WORKFLOW_SHA" -e "GITHUB_WORKSPACE" -e "GITHUB_ACTION" -e "GITHUB_EVENT_PATH" -e "GITHUB_ACTION_REPOSITORY" -e "GITHUB_ACTION_REF" -e "GITHUB_PATH" -e "GITHUB_ENV" -e "GITHUB_STEP_SUMMARY" -e "GITHUB_STATE" -e "GITHUB_OUTPUT" -e "RUNNER_OS" -e "RUNNER_ARCH" -e "RUNNER_NAME" -e "RUNNER_TOOL_CACHE" -e "RUNNER_TEMP" -e "RUNNER_WORKSPACE" -e "ACTIONS_RUNTIME_URL" -e "ACTIONS_RUNTIME_TOKEN" -e "ACTIONS_CACHE_URL" -e GITHUB_ACTIONS=true -e CI=true -v "/var/run/docker.sock":"/var/run/docker.sock" -v "/home/runner/work/_temp/_github_home":"/github/home" -v "/home/runner/work/_temp/_github_workflow":"/github/workflow" -v "/home/runner/work/_temp/_runner_file_commands":"/github/file_commands" -v "/home/runner/work/staticwebdev/staticwebdev":"/github/workspace" 6c0442:fd7fd7dbfb744c4f92002043a0736abb
DeploymentId: 87d77552-21a5-4807-80fc-315a829fc18f

App Directory Location: '/' was found.
Looking for event info
Starting to build app with Oryx
Azure Static Web Apps utilizes Oryx to build both static applications and Azure Functions. You can find more details on Oryx here: https://github.com/microsoft/Oryx
---Oryx build logs---


Operation performed by Microsoft Oryx, https://github.com/Microsoft/Oryx
You can report issues at https://github.com/Microsoft/Oryx/issues

Oryx Version: 0.2.20221[10](https://github.com/foolip/staticwebdev/actions/runs/4597879955/jobs/8121162205#step:4:11)3.1, Commit: a2c65dde152b749fea395f4d1242ea9350942258, ReleaseTagName: 2022[11](https://github.com/foolip/staticwebdev/actions/runs/4597879955/jobs/8121162205#step:4:12)03.1

Build Operation ID: |julP4J9dgIQ=.3ba08750_
Repository Commit : 7ec1c3bb097bfd385b1ea9b88cdee3c363b6647f

Detecting platforms...
Detected following platforms:
  nodejs: [16](https://github.com/foolip/staticwebdev/actions/runs/4597879955/jobs/8121162205#step:4:17).[19](https://github.com/foolip/staticwebdev/actions/runs/4597879955/jobs/8121162205#step:4:20).0
Version '16.19.0' 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.


---End of Oryx build logs---
Oryx could not find a 'build' or 'build:azure' script in the package configuration. Please add one of these commands to your package configuration file (i.e. package.json). Alternatively, you can add the app_build_command to the build/deploy section of your workflow file. For example, app_build_command: 'npm run docs:build'

For further information, please visit the Azure Static Web Apps documentation at https://docs.microsoft.com/en-us/azure/static-web-apps/
If you believe this behavior is unexpected, please raise a GitHub issue at https://github.com/azure/static-web-apps/issues/
Exiting

The important part:

Oryx could not find a 'build' or 'build:azure' script in the package configuration.

Adding a build script fixed this. A small (but wrong) fix is:

--- a/package.json
+++ b/package.json
@@ -2,6 +2,7 @@
   "name": "vanilla-basic",
   "version": "1.0.0",
   "scripts": { 
+    "build": "cp -a src dist",
     "start": "sirv ./src public --cors --single --no-clear --port 8000"
   }
 }