added readme

README.md

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+# Intro
+
+This package uses [Puppeteer](https://www.npmjs.com/package/puppeteer) to start a headless browser session, which will then log into your account and scan for a search query in your downloadable modules.
+
+# Installation
+
+```
+npm install -g opencart-find-module-cli
+
+# or
+yarn global add opencart-find-module-cli
+```
+
+# Usage
+
+```
+$ opencart-find-module
+```
+
+# Configuration
+
+[Configstore](https://www.npmjs.com/package/configstore) is used to store your credentials on your local machine.
+
+Configuration is stored at `~/.config/configstore/opencart-find-module.json`