Update README.md

Author: code-yeongyu

README.md

@@ -16,3 +16,37 @@ pip install twitter-video-tools
 ```sh
 poetry add twitter-video-tools
 ```
+
+## Contribution
+
+### Prerequisites
+
+- Python 3.9
+- poetry
+- code editor (vscode recommended)
+
+### Quick Info of setups
+
+- strict type checking using mypy
+- amazing linters & formatters (`yapf`, `pylint`, `isort`)
+  - `unify` for forcing single-quote
+- unit test using `pytest`
+- vscode launch & formatting setups
+
+### All-in-one
+
+```sh
+gh repo clone code-yeongyu/twitter_video_tools
+python3 -m pip install poetry
+poetry install # install dependencies
+code --install-extension emeraldwalk.RunOnSave # to force single quote
+```
+
+Done!
+
+### Test
+
+```sh
+poetry shell
+inv test
+```