feat: add Node.js guestbook skeleton

README.md

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+This is a simple kiosk landing page that embeds a Google Form and displays approved submissions on a scrolling ticker.
+
+Features
+Embeds an existing Google Form in an iframe
+Fetches approved entries (Name, Location, Comment) from an API endpoint
+Displays approved entries in a scrolling ticker at the bottom of the page
+Getting Started
+Install Node.js if not using Docker.
+Clone this repo and change to the project folder.
+Install dependencies:
+` npm install `
+
+Run locally:
+` node app.js `
+
+Or:
+
+` npm start `
+
+Then open http://localhost:3000 in your browser.
+
+Running in Docker
+Build the image:
+` docker build -t museum-kiosk . `
+
+Run a container:
+` docker run -p 3000:3000 museum-kiosk `
+
+Then open http://localhost:3000 (or the server’s IP) in your browser.
+
+Configuration
+Google Sheets API credentials: Place them as credentials.json (this file should remain uncommitted).
+Adjust environment variables or code as needed for your specific form and sheet.
+License
+MIT License. See LICENSE for details.