Update Madara Description and Introduce Karnot Section on Layer 3 Page (

#362)

src/ch03-05-layer-3.md

@@ -1,6 +1,6 @@
 # Layer 3 (App Chains)
 
-Appchains let you create a blockchain designed precisely for your
+App chains let you create a blockchain designed precisely for your
 application’s needs. These specialized blockchains allow customization
 in various aspects, such as hash functions and consensus algorithms.
 Moreover, they inherit the security features of the Layer 1 or Layer 2
@@ -76,25 +76,29 @@ In summary, Layer 3 provides the flexibility, cost-efficiency, and
 environment conducive for innovation, without significant compromise on
 security.
 
-## Madara as a Sequencer for Layer 3 App Chains
+## Madara as a Framework for Layer 3 App Chains
 
-[Madara](https://github.com/keep-starknet-strange/madara) is a
-specialized sequencer developed to execute transactions and group them
-into batches. Created by the StarkWare Exploration Team, it functions as
-a starting point for building Layer 3 Starknet appchains. This expands
-the possibilities for innovation within the Starknet ecosystem.
+[Madara](https://github.com/keep-starknet-strange/madara) is a framework that simplifies the development of modular app chains on Starknet. With Madara, you can leverage the Starknet stack’s scalability and security advantages while tailoring your chain to the specific requirements of your dApp.
 
-Madara’s flexibility allows for the creation of Layer 3 appchains
-optimized for various needs, for example:
+Key benefits of developing with Madara:
+Comprehensive Control: With Madara, you can customise essential components, such as your prover and compiler version. Madara's flexibility allows integration of experimental features, ensuring your chain precisely meets your dApp's demands.
 
-- Cost-Efficiency: Create an appchain for running a decentralized
-  exchange (DEX) with lower fees compared to the public Starknet.
+Reduced Congestion: Your app chain serves your dApp exclusively, guaranteeing predictable performance and a smooth user experience.
 
-- Performance: Build an appchain to operate a DEX with faster
-  transaction times.
+Chain Sovereignty: Maintaining full decision-making power over the canonical chain is crucial, especially during potential security incidents or disagreements, ensuring you retain control. It's important to acknowledge, however, that this approach can have its drawbacks, warranting careful consideration.
 
-- Privacy: Design an appchain to facilitate anonymous transactions or
-  encrypted messaging services.
+Fee Collection: Manage your app chain's fee structure and retain all of the revenue generated by your application.
 
-For more information on Madara, refer to the subchapter with the same
-title.
+## Karnot: Rollup-as-a-Service for Madara App Chains
+
+[Karnot](https://www.karnot.xyz/), a leading Rollup-as-a-Service provider, simplifies Madara app chain deployment. Leveraging their extensive experience in building scalable infra and their role as core contributors to the Madara framework, Karnot delivers powerful, expertly crafted solutions for your app chain development experience.
+
+Highly scalable infrastructure: Intelligent auto-scaling nodes guarantee your app chain's availability, even during unexpected traffic surges.
+
+Secure bridges: Karnot manages your bridges, mirroring Starknet contracts for efficient integration.
+
+Protected faucets: Robust faucets powered by spam and bot protection for smooth testing environments.
+
+Top-tier security: Rigorous measures safeguard your keys without compromising autonomy.
+
+Comprehensive monitoring: Real-time dashboards offer a centralized view of your app chain activity, empowering data-driven decision-making.