Create CONTRIBUTING.md

Author: MGOPW

CONTRIBUTING.md

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+# Introduction
+If you ever get stuck, you can find us over on the [SNDEVS](https://sndevs.com) slack ([invite.sndevs.com](https://invite.sndevs.com)) in either the #hactoberfest channel or the #next-experience-uib-workspace channel. 
+
+Things you'll need:
+- A [ServiceNow Developer Instance](https://developer.servicenow.com/)
+# Contributing guidelines
+- If you want to contribute changes to the Custom Component itself, be sure to go to the [sister repository](https://github.com/ServiceNowDevProgram/Menu-Generating-Operations-Program-Widget-Custom-Component) and work from there. 
+- Be sure to follow the installation instructions below so your page isn't empty. 
+- Do not make changes to the default page in this experience. Make sure you create a Variant and only make changes there. Don't make changes to other people's variants. 
+# Installation instructions
+Follow these instructions to install the experience page and the menu builder component in your instance.
+
+1. Open App Engine Studio and import this repository directly to your instance.
+2. Install the [Update Set provided in the Releases section of the sister repository](https://github.com/ServiceNowDevProgram/Menu-Generating-Operations-Program-Widget-Custom-Component/releases/tag/original).
+3. Search for `Hacktober23` in the Filter Navigation 
+	1. **Menu Builder** – takes you to the page to play with the component 
+	2. **UI Builder** – takes you to the UI Builder page for the Menu Builder page