# Build Your First Web App

> **NOTE** The Getting Started docs show you how to build your first Mitter.io app with our cloud-hosted sandbox only.
>
> To use it with your docker container, simply change the base API Url (when creating the mitter object) to the address of your running docker container.

## Introduction

Before we get started with this tutorial, let’s have a quick primer on what Mitter.io is and what are we going to build in this tutorial.

### What is Mitter.io?

Mitter.io is a messaging platform which allows you to build apps around messaging. You can treat a message as something more than just an envelope for text with our platform.

### What are we going to build?

In this tutorial, we’re going to build a simple chat app that allows private replies to specific participants in a group.

### Where's the repository for this project?

You can find the complete project [**hosted on GitHub**](https://github.com/mitterio/mitter-getting-started-web-demo). Feel free to clone the repository and play around.

### Tell me more!

Want a detailed guide to building with the platform? Watch our webinars [here](https://www.youtube.com/watch?v=2EERT1O0CHQ)!


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.mitter.io/getting-started/build-your-first-web-app.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.