Accessing a deployed NodeJS app?

Try this:

Create an HTTP Trigger: In your index.js file, you need to define an HTTP-triggered function:

module.exports = async function (context, req) {
    context.log('HTTP trigger function processed a request.');

    const name = (req.query.name || (req.body && req.body.name));
    const responseMessage = name
        ? `Hello, ${name}. This HTTP triggered function executed successfully.`
        : "This HTTP triggered function executed successfully. Pass a name in the query string or in the request body for a personalized response.";

    context.res = {
        // status: 200, /* Defaults to 200 */
        body: responseMessage
    };
};

Configure function.json: Ensure you have a function.json file in the same directory as your index.js file:

{
    "bindings": [
        {
            "authLevel": "function",
            "type": "httpTrigger",
            "direction": "in",
            "name": "req",
            "methods": ["get", "post"]
        },
        {
            "type": "http",
            "direction": "out",
            "name": "res"
        }
    ]
}

• Deploy Your Function: Make sure your function is deployed to Azure. You can do this using the Azure CLI, Visual Studio Code, or directly from the Azure portal.
• Access Your Function: Once deployed, you can access your function using the URL format: https://<your-function-app-name>.azurewebsites.net/api/<function-name>. For example, if your function app name is blahblah-func-70 and your function name is HttpTrigger1, the URL would be https://blahblah-func-70.azurewebsites.net/api/HttpTrigger1.