fix broken links in .md

Author: jzaki

hackathons/README.md

@@ -4,7 +4,7 @@ Aztec is an L2 that brings programmable privacy to Ethereum.
 
 Aztec allows developers to access both public and private state machines for flexible and confidential transactions.
 
-A key part of the Aztec ecosystem is [Noir](https://noir-lang.org/), an open-source zk circuit writing language that simplifies the creation of private smart contracts. This language is developed by the Aztec team, and forms the basis of the [Aztec.nr](https://docs.aztec.network/dev_docs/contracts/main) framework for writing smart contracts.
+A key part of the Aztec ecosystem is [Noir](https://noir-lang.org/), an open-source zk circuit writing language that simplifies the creation of private smart contracts. This language is developed by the Aztec team, and forms the basis of the [Aztec.nr](https://docs.aztec.network/developers/contracts/main) framework for writing smart contracts.
 
 Learn more about our mission in our blog post [here](https://medium.com/aztec-protocol/aztec-the-hybrid-zkrollup-a90a197bf22e).
 And more about what we're currently working on in this blog post about the [Aztec Sandbox](https://aztec.network/blog/announcing-aztec-sandbox-the-endgame-for-smart-contract-privacy/)
@@ -21,7 +21,7 @@ Also be sure to check out [this list of resources](../README.md)
 
 ### Getting started on Noir
 
-See the [Getting Started](https://noir-lang.org/getting_started/nargo_installation/) section of the Noir docs to get set up with Noir.
+See the [Getting Started](https://noir-lang.org/docs/getting_started/installation/) section of the Noir docs to get set up with Noir.
 
 ### Getting started on Aztec
 
@@ -33,11 +33,11 @@ Follow the quickstart [here](https://sandbox.aztec.network/).
 
 #### Deploying an example contract
 
-Find more information about the sandbox and how to deploy a token contract to Aztec [here](https://aztec-docs-dev.netlify.app/dev_docs/getting_started/cli#i-have-the-sandbox-running-now-what).
+Find more information about the sandbox and how to deploy a counter contract to Aztec [here](https://docs.aztec.network/developers/getting_started/aztecnr-getting-started).
 
 #### Writing private programs with aztec.nr
 
-Noir is a ZKDSL for writing zk circuits and verifying them on-chain. [Aztec.nr](http://Aztec.nr) is a smart contract framework -- written in Noir -- that has types and methods for rich smart contract semantics.
+Noir is a ZKDSL for writing zk circuits and verifying them on-chain. [Aztec.nr](http://aztec.nr) is a smart contract framework -- written in Noir -- that has types and methods for rich smart contract semantics.
 
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