docs: add contribution guide (Bowen7#73)

Author: Bowen7

.github/CONTRIBUTING.md

@@ -0,0 +1,35 @@
+# Regex Vis Contribution Guide
+
+## Ask questions
+
+You can open a new [discussion](https://github.com/Bowen7/regex-vis/discussions) to ask questions about this repository or get help.
+
+## Report a bug
+
+Please first search the repository's [Issues](https://github.com/Bowen7/regex-vis/issues) page and make sure that no one has already reported it.
+
+If it hasn't been reported, please feel free to submit an issue.
+
+## Open a PR
+
+Preparation:
+
+1. `pnpm`. `regex-vis` use `pnpm` as the package manager, so make sure to install it globally.
+2. Node.js v16.x You can choose a Node.js version manager to easily switch  between different Node.js versions easily.
+
+Steps:
+
+1. Fork this project to your own account.
+2. Checkout to a new branch.
+3. Run `pnpm install` to install dependencies.
+4. Run `pnpm start` to start a development server on the 3000 port.
+5. Edit code.
+6. Run `pnpm test`. Make sure to pass all test cases.
+7. Submit your code.
+8. [Open a PR on Github](https://github.com/Bowen7/regex-vis/compare).
+
+## FAQ
+
+Q: Can I use Chinese as the language of communication?
+
+A: Yes, but using English is a better choice to make it possible for more people to understand and participate in the conversation.

README.md

@@ -6,25 +6,17 @@
 
 
 ## Features
-- Regular expression visualizer
-- Visual editing regular expression
-- Testing regular expression
+- Visualizing regular expressions
+- Visual editing of regular expressions
+- Testing of regular expressions.
 
 ## Blog
 - [English](https://www.bowencodes.com/post/regex-vis_en)
 - [Chinese](https://www.bowencodes.com/post/regex-vis)
 
-## Deployment
+## Contribution Guide
 
-To deploy this project run
-
-```bash
-# install dependencies, use pnpm!
-$ pnpm install
-
-# serve with hot reload at localhost:3000
-$ pnpm start
-```
+[Contribution Guide](https://github.com/Bowen7/regex-vis/blob/master/.github/CONTRIBUTING.md)
 
 ## Feedback