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+# Installing the Justice40 Tool
+
+## Required Software
+- git, node, yarn, gatsby-cli, and an IDE
+
+### Install Git
+
+#### MacOS
+1. Open the terminal and type `git` and hit RETURN.
+2. If dev tools are not installed a window will prompt you to install dev tools. 
+3. Open the terminal and type `git --version` and hit RETURN.
+4. Validate that a version number is returned. If so, git is properly installed.
+
+#### Win10
+Download from [website](https://git-scm.com/download/win)
+
+
+### Install Homebrew (MacOS only)
+1. Open the terminal and copy / paste this command and hit RETURN.
+
+`/bin/bash -c “$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"`
+
+2. Validate installation by typing `brew -v` in the terminal and ensure a version number is shown.
+
+### Install Node using NVM 
+
+This will work for both MacOS and Win10. Follow instructions on this [link](https://medium.com/@nodesource/installing-node-js-tutorial-using-nvm-5c6ff5925dd8)
+
+
+### Install Yarn and Gatsby CLI
+- This is for both MacOS and Win10
+- Note that while this app uses npm as the package manager, yarn is required to build the [uswds](https://github.com/uswds/uswds) library.
+
+1.  Open the terminal and type `sudo npm install -global yarn` and hit RETURN.
+    1. Type `yarn -v` and hit RETURN
+    2. Verify a version number is shown
+2. Open the terminal and type `sudo npm install -global gatsby-cli` and hit RETURN.
+    1. Type `gatsby-cli -v` and hit RETURN
+    2. Verify a version number is shown
+
+### IDE set up
+While any IDE can be used, we're outlining how to set up VS Code
+
+1. Open the terminal and type `brew install --cask visual-studio-code` and hit RETURN.
+    1. If this doesn't work or for Win10, you can download VS Code from the [website](https://code.visualstudio.com/).
+2. After [forking this repo](https://github.com/usds/justice40-tool/blob/main/CONTRIBUTING.md#code-contributions), you can clone your forked repo into VS Code
+3. VS Code with prompt you to "clone a repo"
+4. Open the terminal and navigate to `client` directory
+5. Type `npm install` to load dependencies
+6. Type `gatsby develop` to spin up the app
+7. Navigate to `localhost:8000` to view the app
+
+#### Recommended VS Code Extensions
+
+1. [Browser Preview](https://github.com/auchenberg/vscode-browser-preview)
+2. [Live Server](https://github.com/ritwickdey/vscode-live-server)
+3. [Live Share](https://github.com/MicrosoftDocs/live-share)
+4. [Live Share Audio](https://github.com/MicrosoftDocs/live-share)
+5. [Live Share Extention Pack](https://github.com/MicrosoftDocs/live-share)