docs(README): update

README.md

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         <img src="https://img.shields.io/github/actions/workflow/status/metadock/contracts/test.yml?branch=main&label=Tests" alt="Tests">
     </a>
     <a href="#">
-        <img src="https://img.shields.io/twitter/follow/gabrielstoica?label=Follow" alt="Twitter Follow">
+        <img src="https://img.shields.io/twitter/follow/MetaDockApp?label=Follow" alt="Twitter Follow">
     </a>
 </p>
 
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 MetaDock aims to offer a decentralised platform for freelancers and small companies to run all their operations
 leveraging the power of web3 as an organisation.
 
+## Architecture
+
+Multiple Containers can be deployed, allowing ERC-20 and native tokens (ETH) to be deposited, acting as a user vault. At
+the same time, a Container can execute arbitrary code on an unlimited number of Modules. This ability enhances the
+MetaDock protocol with a modular architecture, providing an opportunity to create an open market of Modules where
+external players can create and integrate their own use-cases into the protocol.
+
+A module must first be enabled through the `ModuleManager` before being made publicly available to MetaDock users.
+Currently, only the MetaDock team can enable or disable modules due to the high-security risks they present.
+
+### Invoice Module
+
+Our first available module is called `InvoiceModule`. This module enables users to create on-chain invoices that can be
+paid using various methods, such as transfer,
+[linear](https://docs.sablier.com/concepts/protocol/stream-types#lockup-linear) or
+[tranched](https://docs.sablier.com/concepts/protocol/stream-types#lockup-tranched) stream, and have multiple payment
+assets including any ERC-20 token and native ETH.
+
+The `InvoiceModule` relies on the [Sablier V2](https://docs.sablier.com/concepts/what-is-sablier) protocol for stream
+creation and management.
+
+## Contribute
+
+Anyone is welcomed to contribute either by creating & proposing a new module or simply
+[opening](https://github.com/metadock/contracts/issues/new) an issue, starting a discussion or submitting a PR.
+
+If you want to propose a new module, fork this repository and create a new folder inside the `src/modules/[module-name]`
+folder following the `src/modules/invoice-module` module structure. Then, create a new PR with the module logic and a
+detailed description of its capabilities.
+
 ## License
 
 The primary license for MetaDock contracts is the GNU General Public License v3.0 (`GPL-3.0-or-later`),