feat(PE-851): Add Example for Self-Updating Application in dev-cookbook

[blshukla]

📝 Description

• Add new JS application that can self update and run on BrightSign players
• Add optional Nodejs server that serves the "autorun.zip" file expected by the JS app

Issue: JIRA - PE-851

✔️ Dev Complete Checklist

• PR template filled out
• Change is tested by submitter
• PR follows all linting and coding standards
• Github Issue exists (if applicable)
• Team member has been assigned
• At least one commit message is in Conventional Commit format

[Copilot]

Pull Request Overview

Adds a complete example of a self-updating JavaScript application for BrightSign players, including build configs, runtime code, an optional server, and documentation.

• Introduces a TypeScript-based updater app with Webpack and TS configuration
• Adds an optional Express server to serve the autorun.zip package
• Provides a BrightScript autorun.brs script and README instructions

Reviewed Changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
examples/bs-app-updater-example/webpack.config.js	Webpack config for building the updater app
examples/bs-app-updater-example/tsconfig.json	TypeScript compiler settings
examples/bs-app-updater-example/server/package.json	Defines the optional server’s package metadata
examples/bs-app-updater-example/server/index.js	Express server to deliver autorun.zip
examples/bs-app-updater-example/package.json	Main updater app’s package metadata and dependencies
examples/bs-app-updater-example/index.ts	Core logic for downloading, unzipping, backup, and reboot
examples/bs-app-updater-example/autorun.brs	BrightScript autorun entrypoint for the updater
examples/bs-app-updater-example/README.md	Instructions for setup, build, and usage

Comments suppressed due to low confidence (2)

examples/bs-app-updater-example/README.md:55

• The README instructs npm run build for the server, but server/package.json has no build script. Either add a build script or remove this step.

    npm run build

examples/bs-app-updater-example/index.ts:30

• [nitpick] This critical download-and-unzip function lacks unit tests to verify success, error paths, and edge cases. Consider adding tests around network errors, invalid zips, and permission failures.

async function downloadAndUnzipFile(url: string, dest: string): Promise<boolean> {

[evan-morgan]

Only 1 real point to address, the rest are just not-why comments

Addressed review comments

[evan-morgan]

Great job, LGTM