Update overview.md

Updated overview with Andy's suggestions

+ moved all instructions for running locally to the getting started section

+ adding a new feature guide for Explorer Sandbox

docs/overview.md

@@ -2,24 +2,8 @@
 Title: Overview
 ---
 
-# Explorer Overview
+# Stacks Explorer Overview
 
-The Explorer frontend user interface is built with [React](https://reactjs.org/), [next.js](https://github.com/vercel/next.js) and [@stacks/ui](https://github.com/hirosystems/ui).
+The Stacks Explorer is an observability tool that helps users, developers, miners, and investors understand the Stacks Blockchain. It's built with [React](https://reactjs.org/), [next.js](https://github.com/vercel/next.js) and [Chakra UI](https://chakra-ui.com/). Developers cal also deploy and execute contracts through the browser-based Explorer Sandbox. 
 
-Before you can run Explorer on your machine locally, you must first clone the [Explorer](https://github.com/hirosystems/explorer) repository to obtain all of the necessary files and libraries needed.
-
-# Project Dependencies
-
-Once you have cloned the Explorer repositories, you will need to install the following project dependencies:
-
-- [NodeJS](https://nodejs.dev/en/) that includes `npm`
-- [PNPM](https://pnpm.io/installation/)
-- [Homebrew](https://brew.sh/)
-
-> **_NOTE:_**
->
-> Although Homebrew is not required to install and operate Explorer, it is highly recommended.
-
-Open your terminal window, and make sure you are in the `/explorer` folder. Run the below command to install the dependencies:
-
-`pnpm i`
+For instructions on how to run the Stacks Explorer on your machine locally, check out the [Getting Started](https://docs.hiro.so/explorer/getting-started) guide. To learn more about the Explorer Sandbox, refer to the feature guide LINK TBD.