added a quick start guide

.github/QUICKSTARTGUIDE.md

@@ -0,0 +1,75 @@
+## Quick Start
+
+### Step 1: Fork and clone the repository
+
+Fork the github project by clicking on the fork button on the top of this page. This will create a copy of this repository in your account.
+
+Clone your forked repository locally.
+
+```bash
+git clone git@github.com:[username]/tailwindcss.git
+cd tailwindcss
+git fetch
+```
+
+### Step 2: Create a branch
+
+```
+git checkout -b my-branch-name
+```
+
+### Step 3: Make changes
+
+Make necessary changes in files to fix bugs etc.
+
+### Step 4: Run the code
+
+Run `bash npm install -g pnpm` to install pnpm on your system
+
+Our code formatting rules are defined in the `"prettier"` section of [package.json](https://github.com/tailwindcss/tailwindcss/blob/next/package.json). You can check your code against these standards by running:
+
+```sh
+pnpm run lint
+```
+
+To automatically fix any style violations in your code, you can run:
+
+```sh
+pnpm run format
+```
+
+### Running tests
+
+You can run the test suite using the following commands:
+
+```sh
+pnpm build && pnpm test
+```
+
+### Step 5: Commit
+
+It is a best practice to keep your changes as logically grouped as possible within individual commits.
+
+```
+git add my/changed/files
+```
+
+#### Commit message
+
+A commit message should describe what changed and why.
+
+```
+git commit -m "The body of the commit message, should explain what changed."
+```
+
+### Step 6: Push changes to Github
+
+Once you are sure your commits are ready to go, with passing tests and formatting, begin the process of opening a pull request by pushing your working branch to your fork on GitHub.
+
+```
+git push -u origin my-branch-name
+```
+
+### Step 7: Submit the pull request
+
+Go to your repository on Github, click the `Compare & pull request` button and then submit the pull request.